Updated on 2026/03/25

写真a

 
NAKAMURA RYUHEI
 
Organization
Institute of Future Science Earth-Life Science Institute Professor
Title
Professor
External link

News & Topics

  • 窒素化合物の選択的化学変換 脱共役プロトン電子移動による触媒反応の制御

    2022/09/14

    Languages： Japanese

    　 More details

    概要東京工業大学 地球生命研究所（ELSI）の中村龍平教授（理化学研究所環境資源科学研究センター生体機能触媒研究チーム チームリーダー）、理化学研究所環境資源科学研究センター生体機能触媒研究チームの大岡英史研究員、何道平国際プログラム・アソシエイト（研究当時、現東京工業大学 地球生命研究所（ELSI）研究員）らの国際共同研究グループは、一つの固体触媒[用語1]から複数の窒素化合物を選択的[用語2a

  • Study discovers process that may have produced first organic molecules for life on Earth

    2020/10/12

    Languages： English

    　 More details

    New research assisted by Earth-Life Science Institute (ELSI) at Tokyo Institute of Technology Professors Shawn McGlynn and Ryuhei Nakamura identified

Research Areas

  • Natural Science / Biogeosciences

  • Nanotechnology/Materials / Energy chemistry

Research History

  • Osaka University, Graduate School of Engineering Science   Department of Materials Engineering Science

    　 More details

Papers

  • Copper-rich deep-sea hydrothermal vent minerals facilitate hydrogen cyanide formation from glycine

    Ryuhei Nakamura, Zening Yang, Yamei Li, Yanjing Lu, Akira Yamaguchi, Kiyohiro Adachi, Masahiro Yamamoto, Daisuke Hashizume

    2026.3

    　More details

  • Hydration entropy of cations regulates chloride ion diffusion during electrochemical chlorine evolution

    Taejung Lim, Hideshi Ooka, Yuhang Yu, Takeharu Murakami, Satoshi Wada, Ryuhei Nakamura

    Nature Chemistry   2026.3

    　More details

    Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/s41557-025-02014-4

    researchmap

  • Influence of Electrolyte Cations on the Oxygen Evolution Reaction of Nanochanneled Manganese Oxide

    Koichi Yatsuzuka, Shuang Kong, Kiyohiro Adachi, Ailong Li, Daisuke Hashizume, Ryuhei Nakamura, Hideshi Ooka

    ACS Catalysis   2026.2

    　More details

    Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acscatal.5c05079

    researchmap

  • Cooling water to near freezing breaks the activity-stability trade-off of water oxidation catalyzed by manganese oxides

    Aufandra Cakra Wardhana, Hideshi Ooka, Ailong Li, Kiyohiro Adachi, Chen Chen, Daisuke Hashizume, Ryuhei Nakamura

    2025.11

    　More details

  • Thermoneutrality Is Not Necessary to Maximize Oxygen Evolution Reaction Rates

    Hideshi Ooka, Tomoharu Suda, Koichi Yatsuzuka, Ryuhei Nakamura

    ChemSusChem   2025.7

    　More details

    Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/cssc.202402625

    researchmap

  • Hydrogen cyanide generation from amino acids for prebiotic evolution

    Zening Yang, Yamei Li, Norio Kitadai, Masahiro Yamamoto, Yuichiro Ueno, Ryuhei Nakamura

    2025.6

    　More details

  • Expectations for Papers on Electrochemical Processes and Materials in ACS Sustainable Chemistry & Engineering

    Elizabeth J. Biddinger, Nour Abdoulmoumine, Dean Brady, Danielle Julie Carrier, Jingwen Chen, Nicholas Gathergood, Hongxian Han, Sachin Handa, Ive Hermans, King Kuok Mimi Hii, Bing Joe Hwang, Kevin C. Leonard, Watson Loh, Andrew C. Marr, Michael A. R. Meier, Audrey Moores, Ryuhei Nakamura, Graham N. Newton, Victor Sans, Clara Santato, Kotaro Satoh, Yogendra Shastri, Wil V. Srubar, Bala Subramaniam, Lei Wang, Ning Yan, Carlos Toro, Peter Licence

    ACS Sustainable Chemistry & Engineering   13 ( 21 )   7683 - 7686   2025.6

    　More details

    Publishing type：Research paper (scientific journal)   Publisher：American Chemical Society (ACS)  

    DOI： 10.1021/acssuschemeng.5c04768

    researchmap

  • Time course change of proton exchange membrane water electrolysis (PEMWE) electric properties for hydrogen evolution with MnIrOx oxygen evolution catalyst

    Miyuki Nara, Katsushi Fujii, Takeharu Murakami, Kazuna Fushimi, Shuang Kong, Ailong Li, Takayo Ogawa, Ryuhei Nakamura, Satoshi Wada

    MRS Communications   2025.5

    　More details

    Publishing type：Research paper (scientific journal)  

    DOI： 10.1557/s43579-025-00744-7

    researchmap

  • Oxygen Evolution Catalysis by Manganese Oxides Resilient to Voltage Fluctuations

    Ryuhei Nakamura, Ailong Li, Hideshi Ooka, Shuang Kong, Kiyohiro Adachi, Sun Hee Kim, Daisuke Hashizume

    2025.3

    　More details

  • Expectations for Manuscripts in the Field of Polymer Science in ACS Sustainable Chemistry & Engineering

    Michael A. R. Meier, Bala Subramaniam, Audrey Moores, Watson Loh, Elizabeth J. Biddinger, Bing Joe Hwang, Kotaro Satoh, Graham N. Newton, Sachin Handa, Ning Yan, King Kuok Mimi Hii, Andrew Craig Marr, Ive Hermans, Kevin C. Leonard, D. Julie Carrier, Jingwen Chen, Clara Santato, Dean Brady, Wil V. Srubar, Yogendra Shastri, Ryuhei Nakamura, Nicholas Gathergood, Hongxian Han, Julio F. Serrano, Peter Licence

    ACS Sustainable Chemistry & Engineering   13 ( 8 )   3022 - 3023   2025.3

    　More details

    Publishing type：Research paper (scientific journal)   Publisher：American Chemical Society (ACS)  

    DOI： 10.1021/acssuschemeng.5c01303

    researchmap

  • Cation-controlled diffusion of chloride ions during electrochemical chlorine evolution in acidic media

    Ryuhei Nakamura, Taejung Lim, Hideshi Ooka

    2025.1

    　More details

  • Polymorph γ-MnO2 with Optimal Phase Composition for Stable Oxygen Evolution Reaction in Acid

    Lin Liu, Shuang Kong, Yimeng Sun, Qinqin Hu, Pengfei Zhang, Ailong Li, Kiyohiro Adachi, Daisuke Hashizume, Ryuhei Nakamura, Taifeng Liu, Can Li, Hongxian Han

    ACS Sustainable Chemistry & Engineering   2024.12

    　More details

    Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acssuschemeng.4c06977

    researchmap

  • An empirical approach-based analysis for the exploration of ternary metal sulfide as an active and selective CO2 reduction electrocatalyst

    An Niza El Aisnada, Yuhki Yui, Ji-Eun Lee, Norio Kitadai, Ryuhei Nakamura, Masaya Ibe, Masahiro Miyauchi, Akira Yamaguchi

    Materials Science and Engineering: R: Reports   161   100832 - 100832   2024.12

    　More details

    Publishing type：Research paper (scientific journal)   Publisher：Elsevier BV  

    DOI： 10.1016/j.mser.2024.100832

    researchmap

  • Cover Feature: Water Chemistry at the Nanoscale: Clues for Resolving the “Water Paradox” Underlying the Emergence of Life (ChemistryEurope 6/2024)

    Hye‐Eun Lee, Michael Russell, Ryuhei Nakamura

    ChemistryEurope   2024.11

    　More details

    Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/ceur.202480602

    researchmap

  • Microkinetic Model to Rationalize the Lifetime of Electrocatalysis: Trade-off between Activity and Stability. International journal

    Hideshi Ooka, Marie E Wintzer, Hirokazu Komatsu, Tomoharu Suda, Kiyohiro Adachi, Ailong Li, Shuang Kong, Daisuke Hashizume, Atsushi Mochizuki, Ryuhei Nakamura

    The journal of physical chemistry letters   10079 - 10085   2024.9

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    Electrocatalysts which can operate for several years are required to produce hydrogen and commodity chemicals in an environmentally friendly manner. However, designing materials with long operational lifetimes is challenging, due to the lack of a conceptual framework to predict catalytic lifetimes quantitatively. Here, we report a microkinetic equation which quantifies the lifetime of an electrocatalyst undergoing dissolution. This equation was obtained by taking advantage of the fact that catalysis is much faster than deactivation, which allows the ordinary differential equations to be solved via the quasi steady-state approximation. All chemical reactions were modeled as irreversible, first-order elementary reactions. Under this assumption, the catalytic rate correlates linearly with the deactivation rate, leading to a trade-off relationship between activity and stability. Our model was supported by the correlation between theoretical and experimental lifetimes (r2 = 0.86) of a manganese oxide electrocatalyst during the oxygen evolution reaction.

    DOI： 10.1021/acs.jpclett.4c02162

    PubMed

    researchmap

  • Thermodynamics Underpinning the Microbial Community-Level Nitrogen Networks

    Mayumi Seto, Risa Sasaki, Hideshi Ooka, Ryuhei Nakamura

    2024.5

    　More details

  • Atomically dispersed hexavalent iridium oxide from MnO 2 reduction for oxygen evolution catalysis

    Ailong Li, Shuang Kong, Kiyohiro Adachi, Hideshi Ooka, Kazuna Fushimi, Qike Jiang, Hironori Ofuchi, Satoru Hamamoto, Masaki Oura, Kotaro Higashi, Takuma Kaneko, Tomoya Uruga, Naomi Kawamura, Daisuke Hashizume, Ryuhei Nakamura

    Science   384 ( 6696 )   666 - 670   2024.5

    　More details

    Publishing type：Research paper (scientific journal)   Publisher：American Association for the Advancement of Science (AAAS)  

    Hexavalent iridium (Ir VI ) oxide is predicted to be more active and stable than any other iridium oxide for the oxygen evolution reaction in acid; however, its experimental realization remains challenging. In this work, we report the synthesis, characterization, and application of atomically dispersed Ir VI oxide (Ir VI - ado ) for proton exchange membrane (PEM) water electrolysis. The Ir VI - ado was synthesized by oxidatively substituting the ligands of potassium hexachloroiridate(IV) (K 2 IrCl 6 ) with manganese oxide (MnO 2 ). The mass-specific activity (1.7 × 10 5 amperes per gram of iridium) and turnover number (1.5 × 10 8 ) exceeded those of benchmark iridium oxides, and in situ x-ray analysis during PEM operations manifested the durability of Ir VI at current densities up to 2.3 amperes per square centimeter. The high activity and stability of Ir VI - ado showcase its promise as an anode material for PEM electrolysis.

    DOI： 10.1126/science.adg5193

    researchmap

  • Temperature and Pressure Dependence of Hydrothermal Electrodeposition of Molybdenum Sulfide

    Akira Yamaguchi, Ryota Kubo, An Niza El Aisnada, Kiyohiro Adachi, Ji-Eun Lee, Norio Kitadai, Daisuke Hashizume, Ryuhei Nakamura, Masahiro Miyauchi

    ACS Applied Energy Materials   2024.4

    　More details

    Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acsaem.3c02565

    researchmap

  • Rationalizing the Influence of the Binding Affinity on the Activity of Phosphoserine Phosphatases. International journal

    Yoko Chiba, Hideshi Ooka, Marie E Wintzer, Nao Tsunematsu, Toshihiko Nogawa, Takehiro Suzuki, Naoshi Dohmae, Ryuhei Nakamura

    Angewandte Chemie (International ed. in English)   63 ( 13 )   e202318635   2024.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    The Sabatier principle states that catalytic activity can be maximized when the substrate binding affinity is neither too strong nor too weak. Recent studies have shown that the activity of several hydrolases is maximized at intermediate values of the binding affinity (Michaelis-Menten constant: Km ). However, it remains unclear whether this concept of artificial catalysis is applicable to enzymes in general, especially for those which have evolved under different reaction environments. Herein, we show that the activity of phosphoserine phosphatase is also enhanced at an intermediate Km value of approximately 0.5 mM. Within our dataset, the variation of Km by three orders of magnitude accounted for a roughly 18-fold variation in the activity. Owing to the high phylogenetic and physiological diversity of our dataset, our results support the importance of optimizing Km for enzymes in general. On the other hand, a 77-fold variation in the activity was attributed to other physicochemical parameters, such as the Arrhenius prefactor of kcat , and could not be explained by the Sabatier principle. Therefore, while tuning the binding affinity according to the Sabatier principle is an important consideration, the Km value is only one of many physicochemical parameters which must be optimized to maximize enzymatic activity.

    DOI： 10.1002/anie.202318635

    PubMed

    researchmap

  • Acid-stable manganese oxides for proton exchange membrane water electrolysis

    Shuang Kong, Ailong Li, Jun Long, Kiyohiro Adachi, Daisuke Hashizume, Qike Jiang, Kazuna Fushimi, Hideshi Ooka, Jianping Xiao, Ryuhei Nakamura

    Nature Catalysis   2024.1

    　More details

    Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/s41929-023-01091-3

    researchmap

  • Effects of dissolved 3d-block metal ions on PEM water electrolysis performance

    Shuang Kong, Kazuna Fushimi, Ailong Li, Ryuhei Nakamura

    Chemical Communications   2024

    　More details

    Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/D4CC04474F

    researchmap

  • Aqueous breakdown of aspartate and glutamate to n-ω-amino acids on the parent bodies of carbonaceous chondrites and asteroid Ryugu

    Yamei Li, Hiroyuki Kurokawa, Yasuhito Sekine, Yoko Kebukawa, Yuko Nakano, Norio Kitadai, Naizhong Zhang, Xiaofeng Zang, Yuichiro Ueno, Gen Fujimori, Ryuhei Nakamura, Kosuke Fujishima, Junko Isa

    Science Advances   9 ( 50 )   2023.12

    　More details

    Publishing type：Research paper (scientific journal)   Publisher：American Association for the Advancement of Science (AAAS)  

    Amino acids in carbonaceous chondrites may have seeded the origin of life on Earth and possibly elsewhere. Recently, the return samples from a C-type asteroid Ryugu were found to contain amino acids with a similar distribution to Ivuna-type CI chondrites, suggesting the potential of amino acid abundances as molecular descriptors of parent body geochemistry. However, the chemical mechanisms responsible for the amino acid distributions remain to be elucidated particularly at low temperatures (<50°C). Here, we report that two representative proteinogenic amino acids, aspartic acid and glutamic acid, decompose to β-alanine and γ-aminobutyric acid, respectively, under simulated geoelectrochemical conditions at 25°C. This low-temperature conversion provides a plausible explanation for the enrichment of these two n-ω-amino acids compared to their precursors in heavily aqueously altered CI chondrites and Ryugu’s return samples. The results suggest that these heavily aqueously altered samples originated from the water-rich mantle of their water/rock differentiated parent planetesimals where protein α-amino acids were decomposed.

    DOI： 10.1126/sciadv.adh7845

    researchmap

  • A Non-Rate-Determining Redox Process Dictates the Oxygen Evolution Tafel Slope of MnO2

    Koichi Yatsuzuka, Kiyohiro Adachi, Ailong Li, Shuang Kong, Satoru Hamamoto, Daisuke Hashizume, Ryuhei Nakamura, Hideshi Ooka

    The Journal of Physical Chemistry C   2023.11

    　More details

    Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acs.jpcc.3c04380

    researchmap

  • Hydrothermal electrochemical flow reactor to independently control temperature, pressure, and potential for manganese oxide electrodeposition

    Yoshiki Otsubo, Kanan Otani, Ailong Li, Kiyohiro Adachi, Shuang Kong, Norio Kitadai, Daisuke Hashizume, Ryuhei Nakamura, Takeshi Fujita, Masahiro Miyauchi, Akira Yamaguchi

    Ceramics International   2023.11

    　More details

    Publishing type：Research paper (scientific journal)   Publisher：Elsevier BV  

    DOI： 10.1016/j.ceramint.2023.11.265

    researchmap

  • Thermodynamic principle to enhance enzymatic activity using the substrate affinity. International journal

    Hideshi Ooka, Yoko Chiba, Ryuhei Nakamura

    Nature communications   14 ( 1 )   4860 - 4860   2023.8

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    Understanding how to tune enzymatic activity is important not only for biotechnological applications, but also to elucidate the basic principles guiding the design and optimization of biological systems in nature. So far, the Michaelis-Menten equation has provided a fundamental framework of enzymatic activity. However, there is still no concrete guideline on how the parameters should be optimized towards higher activity. Here, we demonstrate that tuning the Michaelis-Menten constant ([Formula: see text]) to the substrate concentration ([Formula: see text]) enhances enzymatic activity. This guideline ([Formula: see text]) was obtained mathematically by assuming that thermodynamically favorable reactions have higher rate constants, and that the total driving force is fixed. Due to the generality of these thermodynamic considerations, we propose [Formula: see text] as a general concept to enhance enzymatic activity. Our bioinformatic analysis reveals that the [Formula: see text] and in vivo substrate concentrations are consistent across a dataset of approximately 1000 enzymes, suggesting that even natural selection follows the principle [Formula: see text].

    DOI： 10.1038/s41467-023-40471-y

    PubMed

    researchmap

  • Osmotic Energy Conversion in Deep-Sea Hydrothermal Vents

    Hye-Eun Lee, Tomoyo Okumura, Hideshi Ooka, Kiyohiro Adachi, Takaaki Hikima, Kunio Hirata, Yoshiaki Kawano, Hiroaki Matsuura, Masaki Yamamoto, Masahiro Yamamoto, Akira Yamaguchi, Ji-Eun Lee, Ki Tae Nam, Yasuhiko Ohara, Daisuke Hashizume, Shawn McGlynn, Ryuhei Nakamura

    2023.6

    　More details

    Publisher：American Chemical Society (ACS)  

    Selective ion transport through nanochannels plays a crucial role in osmotic energy conversion in cellular systems. We show that this cell-essential process occurs in a submarine hydrothermal vent (HV) precipitate derived from a serpentine-hosted geological environment. Plate-like layered nanocrystals are aligned on the nano to millimeter scale, forming confined nanochannels in the HV precipitate. The nanochannels with surface charges function as a cation- and anion-selective ion transport membrane, allowing the precipitates to convert ionic gradients of Na+, K+, H+, and Cl- into electrical energy. Our findings suggest that osmotic energy conversion can occur spontaneously and widely through geological processes, offering valuable insights into the establishment of electrochemically coupled ion transport in early life as well as the creation of self-organized structures in engineering fields.

    DOI： 10.26434/chemrxiv-2023-v9nc6

    researchmap

  • Nonenzymatic anaerobic ammonium oxidation through a hydrazine intermediate

    Daoping He, Kiyohiro Adachi, Daisuke Hashizume, ryuhei nakamura

    Nature Chemistry   2023.4

    　More details

    Publishing type：Research paper (scientific journal)  

    DOI： 10.26434/chemrxiv-2023-rjkf6

    researchmap

  • Hybrid Structure Analysis: Accurate and Precise Determination of the Structure Parameters of Mono- and Bimetallic Spinels by Iterative and Alternating Refinements of Powder X-ray Diffraction and X-ray Absorption Fine Structure

    Kiyohiro AdachI, Ailong Li, Shuang Kong, Ryuhei Nakamura, Daisuke Hashizume

    BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN   96 ( 4 )   359 - 366   2023.4

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1246/bcsj.20230016

    Web of Science

    researchmap

  • Diverse Phosphoserine Phosphatases Exhibit Maximum Activity at an Intermediate Binding Affinity in Accord with the Sabatier Principle of Catalysis

    Yoko Chiba, Hideshi Ooka, Marie Wintzer, Nao Tsunematsu, Takehiro Suzuki, Naoshi Dohmae, Ryuhei Nakamura

    bioRxiv   2023.3

    　More details

  • Universal Design Principle to Enhance Enzymatic Activity using the Substrate Affinity

    Hideshi Ooka, Yoko Chiba, Ryuhei Nakamura

    bioRxiv   2023.2

    　More details

    Publishing type：Research paper (scientific journal)  

    DOI： 10.1101/2023.02.01.526728

    researchmap

  • Design Strategy for CO2 Reduction Metal Sulfide Electrocatalysts Based on Multi-regression Analysis

    Yamaguchi Akira, Arai Katsuki, Aisnada An Niza El, Ji-Eun Lee, Kitadai Norio, Nakamura Ryuhei, Miyauchi Masahiro

    Materia Japan   62 ( 1 )   40 - 47   2023.1

    　More details

    Language：Japanese   Publishing type：Research paper (scientific journal)   Publisher：The Japan Institute of Metals and Materials  

    DOI： 10.2320/materia.62.40

    CiNii Research

    researchmap

    Other Link： https://ndlsearch.ndl.go.jp/books/R000000004-I032620007

  • In situ electrosynthetic bacterial growth using electricity generated by a deep-sea hydrothermal vent

    Masahiro Yamamoto, Yoshihiro Takaki, Hiroyuki Kashima, Miwako Tsuda, Akiko Tanizaki, Ryuhei Nakamura, Ken Takai

    ISME JOURNAL   17 ( 1 )   12 - 20   2023.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/s41396-022-01316-6

    Web of Science

    researchmap

  • Regulation of the electrocatalytic nitrogen cycle based on sequential proton-electron transfer

    Daoping He, Hideshi Ooka, Yamei Li, Yujeong Kim, Akira Yamaguchi, Kiyohiro Adachi, Daisuke Hashizume, Naohiro Yoshida, Sakae Toyoda, Sun Hee Kim, Ryuhei Nakamura

    NATURE CATALYSIS   5 ( 9 )   798 - 806   2022.9

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/s41929-022-00833-z

    Web of Science

    researchmap

  • Tracing and regulating redox homeostasis of model benthic ecosystems for sustainable aquaculture in coastal environments

    Nobuaki Shono, Mana Ito, Akio Umezawa, Kenji Sakata, Ailong Li, Jun Kikuchi, Katsutoshi Ito, Ryuhei Nakamura

    FRONTIERS IN MICROBIOLOGY   13   2022.8

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.3389/fmicb.2022.907703

    Web of Science

    researchmap

  • Multi-Regression Analysis of CO2 Electroreduction Activities on Metal Sulfides

    Akira Yamaguchi, Katsuki Arai, An Niza El Aisnada, Ji-Eun Lee, Norio Kitadai, Ryuhei Nakamura, Masahiro Miyauchi

    JOURNAL OF PHYSICAL CHEMISTRY C   126 ( 5 )   2772 - 2779   2022.2

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acs.jpcc.1c08993

    Web of Science

    researchmap

  • Enhancing the stability of cobalt spinel oxide towards sustainable oxygen evolution in acid

    Ailong Li, Shuang Kong, Chenxi Guo, Hideshi Ooka, Kiyohiro Adachi, Daisuke Hashizume, Qike Jiang, Hongxian Han, Jianping Xiao, Ryuhei Nakamura

    NATURE CATALYSIS   5 ( 2 )   109 - 118   2022.2

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/s41929-021-00732-9

    Web of Science

    researchmap

  • Building Pathways to a Sustainable Planet

    David T. Allen, Peter Licence, Bala Subramaniam, Paul T. Anastas, D. Julie Carrier, Jingwen Chen, Nicholas Gathergood, Jeannette M. Garcia, Jinlong Gong, Hongxian Han, King Kuok (Mimi) Hii, Bing-Joe Hwang, Andrew Marr, Michael Meier, Audrey Moores, Ryuhei Nakamura, Thalappil Pradeep, Liane Rossi, Bert Sels, Michael K. C. Tam, Lin Zhuang, Julio F. Serrano

    ACS SUSTAINABLE CHEMISTRY & ENGINEERING   10 ( 1 )   1 - 2   2022.1

    　More details

  • Expectations for Perspectives in ACS Sustainable Chemistry & Engineering

    David T. Allen, D. Julie Carrier, Jingwen Chen, Nicholas Gathergood, Jeannette M. Garcia, Jinlong Gong, Hongxian Han, King Kuok (Mimi) Hii, Bing-Joe Hwang, Asha Liza James, Mihir Jha, Peter Licence, Andrew C. Marr, Michael Meier, Audrey Moores, Ryuhei Nakamura, Thalappil Pradeep, Liane Rossi, Bert Sels, Bala Subramaniam, Michael K. C. Tam, Lin Zhuang, Julio F. Serrano

    ACS SUSTAINABLE CHEMISTRY & ENGINEERING   9 ( 49 )   16528 - 16530   2021.12

    　More details

  • Electrochemically induced metal- vs. ligand-based redox changes in mackinawite: identification of a Fe3+- and polysulfide-containing intermediate

    Sebastian A. Sanden, Robert K. Szilagyi, Yamei Li, Norio Kitadai, Samuel M. Webb, Takaaki Yano, Ryuhei Nakamura, Masahiko Hara, Shawn E. McGlynn

    DALTON TRANSACTIONS   50 ( 34 )   11763 - 11774   2021.9

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/d1dt01684a

    Web of Science

    researchmap

  • Nitrite as a causal factor for nitrate-dependent anaerobic corrosion of metallic iron induced by Prolixibacter strains

    Takao Iino, Nobuaki Shono, Kimio Ito, Ryuhei Nakamura, Kazuo Sueoka, Shigeaki Harayama, Moriya Ohkuma

    MICROBIOLOGYOPEN   10 ( 4 )   2021.8

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/mbo3.1225

    Web of Science

    researchmap

  • Non-Zero Binding Enhances Kinetics of Catalysis: Machine Learning Analysis on the Experimental Hydrogen Binding Energy of Platinum

    Hideshi Ooka, Marie E. Wintzer, Ryuhei Nakamura

    ACS CATALYSIS   11 ( 10 )   6298 - 6303   2021.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acscatal.1c01018

    Web of Science

    researchmap

  • Characterization of a Non-Classic Type Phosphoserine Phosphatase Homolog in Thermodesulfidibacter takaii, a Thermophilic, Autotrophic Bacterium in the Phylum Aquificae

    Marie Wintzer, Ryuhei Nakamura, Yoko Chiba

    FASEB JOURNAL   35   2021.5

    　More details

  • In situ FTIR study of CO2 reduction on inorganic analogues of carbon monoxide dehydrogenase

    Ji-Eun Lee, Akira Yamaguchi, Hideshi Ooka, Tomohiro Kazami, Masahiro Miyauchi, Norio Kitadai, Ryuhei Nakamura

    CHEMICAL COMMUNICATIONS   57 ( 26 )   3267 - 3270   2021.4

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/d0cc07318k

    Web of Science

    researchmap

  • Thioester synthesis through geoelectrochemical CO2 fixation on Ni sulfides

    Norio Kitadai, Ryuhei Nakamura, Masahiro Yamamoto, Satoshi Okada, Wataru Takahagi, Yuko Nakano, Yoshio Takahashi, Ken Takai, Yoshi Oono

    COMMUNICATIONS CHEMISTRY   4 ( 1 )   2021.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/s42004-021-00475-5

    Web of Science

    researchmap

  • Atomic-scale evidence for highly selective electrocatalytic N-N coupling on metallic MoS2

    Daoping He, Hideshi Ooka, Yujeong Kim, Yamei Li, Fangming Jin, Sun Hee Kim, Ryuhei Nakamura

    PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA   117 ( 50 )   31631 - 31638   2020.12

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1073/pnas.2008429117

    Web of Science

    researchmap

  • Remembering Professor, Academician, and Editor Lina Zhang

    David T. Allen, D. Julie Carrier, Jingwen Chen, Nicholas Gathergood, Jinlong Gong, Hongxian Han, King Kuok (Mimi) Hii, Bing-Joe Hwang, Peter Licence, Michael Meier, Audrey Moores, Ryuhei Nakamura, Thalappil Pradeep, Bert Sels, Bala Subramaniam, Michael K. C. Tam, Lin Zhuang

    ACS SUSTAINABLE CHEMISTRY & ENGINEERING   8 ( 44 )   16385 - 16385   2020.11

    　More details

  • Expectations for Manuscripts in ACS Sustainable Chemistry & Engineering: Scope Summary and Call for Creativity

    David T. Allen, Julie Carrier, Jingwen Chen, Nicholas Gathergood, Jinlong Gong, Hongxian Han, King Kuok (Mimi) Hii, Bing-Joe Hwang, Asha Liza James, Peter Licence, Michael Meier, Audrey Moores, Ryuhei Nakamura, Thalappil Pradeep, Bert Sels, Bala Subramaniam, Michael K. C. Tam, Lina Zhang, Lin Zhuang, Rhea M. Williams

    ACS SUSTAINABLE CHEMISTRY & ENGINEERING   8 ( 43 )   16046 - 16047   2020.11

    　More details

  • CO2 reduction driven by a pH gradient

    Reuben Hudson, Ruvan de Graaf, Mari Strandoo Rodin, Aya Ohno, Nick Lane, Shawn E. McGlynn, Yoichi M. A. Yamada, Ryuhei Nakamura, Laura M. Barge, Dieter Braun, Victor Sojo

    PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA   117 ( 37 )   22873 - 22879   2020.9

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1073/pnas.2002659117

    Web of Science

    researchmap

  • The Changing Structure of Scientific Communication: Expanding the Nature of Letters Submissions to ACS Sustainable Chemistry & Engineering

    David T. Allen, D. Julie Carrier, Jingwen Chen, Nicholas Gathergood, Jinlong Gong, Hongxian Han, King Kuok (Mimi) Hii, Bing-Joe Hwang, Peter Licence, Michael Meier, Audrey Moores, Ryuhei Nakamura, Thalappil Pradeep, Bert Sels, Bala Subramaniam, Michael K. C. Tam, Lina Zhang, Lin Zhuang, Rhea M. Williams

    ACS SUSTAINABLE CHEMISTRY & ENGINEERING   8 ( 23 )   8469 - 8470   2020.6

    　More details

  • Enzyme Mimetic Active Intermediates for Nitrate Reduction in Neutral Aqueous Media

    Yamei Li, Yoo Kyung Go, Hideshi Ooka, Daoping He, Fangming Jin, Sun Hee Kim, Ryuhei Nakamura

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION   59 ( 24 )   9744 - 9750   2020.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/anie.202002647

    Web of Science

    researchmap

  • Multi-omics analysis on an agroecosystem reveals the significant role of organic nitrogen to increase agricultural crop yield

    Yasunori Ichihashi, Yasuhiro Date, Amiu Shino, Tomoko Shimizu, Arisa Shibata, Kie Kumaishi, Fumiaki Funahashi, Kenji Wakayama, Kohei Yamazaki, Akio Umezawa, Takumi Sato, Makoto Kobayashi, Mayu Kamimura, Miyako Kusano, Fang-Sik Che, Martin O'Brien, Keitaro Tanoi, Makoto Hayashi, Ryuhei Nakamura, Ken Shirasu, Jun Kikuchi, Naoto Nihei

    PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA   117 ( 25 )   14552 - 14560   2020.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1073/pnas.1917259117

    Web of Science

    researchmap

  • A reduced imidazolium cation layer serves as the active site for electrochemical carbon dioxide reduction

    Yuanqing Wang, Toru Hayashi, Daoping He, Yamei Li, Fangming Jin, Ryuhei Nakamura

    APPLIED CATALYSIS B-ENVIRONMENTAL   264   2020.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.apcatb.2019.118495

    Web of Science

    researchmap

  • Enzyme Mimetic Active Intermediates for Nitrate Reduction in Neutral Aqueous Media

    Yamei Li, Yoo Kyung Go, Hideshi Ooka, Daoping He, Fangming Jin, Sun Hee Kim, Ryuhei Nakamura

    Angewandte Chemie   132 ( 24 )   9831 - 9837   2020.4

    　More details

    Publishing type：Research paper (scientific journal)   Publisher：Wiley  

    DOI： 10.1002/ange.202002647

    researchmap

  • Expectations for Papers on Photochemistry, Photoelectrochemistry, and Electrochemistry for Energy Conversion and Storage in ACS Sustainable Chemistry & Engineering

    Hongxian Han, Jinlong Gong, Bing-Joe Hwang, Ryuhei Nakamura, Lin Zhuang, David T. Allen, Peter Licence, Bala Subramaniam

    ACS SUSTAINABLE CHEMISTRY & ENGINEERING   8 ( 8 )   3038 - +   2020.3

    　More details

  • The Evolution of ACS Sustainable Chemistry & Engineering

    David T. Allen, D. Julie Carrier, Jingwen Chen, Nicholas Gathergood, Jinlong Gong, Hongxian Han, King Kuok (Mimi) Hii, Bing-Joe Hwang, Peter Licence, Michael Meier, Audrey Moores, Ryuhei Nakamura, Thalappil Pradeep, Bert Sels, Bala Subramaniam, Michael K. C. Tam, Lina Zhang, Lin Zhuang, Rhea M. Williams, Paul T. Anastas

    ACS SUSTAINABLE CHEMISTRY & ENGINEERING   8 ( 1 )   1 - 1   2020.1

    　More details

  • Shift of the Optimum Binding Energy at Higher Rates of Catalysis

    Hideshi Ooka, Ryuhei Nakamura

    JOURNAL OF PHYSICAL CHEMISTRY LETTERS   10 ( 21 )   6706 - 6713   2019.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acs.jpclett.9b01796

    Web of Science

    researchmap

  • Phase-selective Hydrothermal Synthesis of Metallic MoS2 at High Temperature

    Daoping He, Hideshi Ooka, Yamei Li, Fangming Jin, Ryuhei Nakamura

    CHEMISTRY LETTERS   48 ( 8 )   828 - 831   2019.8

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1246/cl.190254

    Web of Science

    researchmap

  • Electrochemical characterization of manganese oxides as a water oxidation catalyst in proton exchange membrane electrolysers

    Toru Hayashi, Nadege Bonnet-Mercier, Akira Yamaguchi, Kazumasa Suetsugu, Ryuhei Nakamura

    ROYAL SOCIETY OPEN SCIENCE   6 ( 5 )   2019.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1098/rsos.190122

    Web of Science

    researchmap

  • Stable Potential Windows for Long‐Term Electrocatalysis by Manganese Oxides Under Acidic Conditions

    Ailong Li, Hideshi Ooka, Nadège Bonnet, Toru Hayashi, Yimeng Sun, Qike Jiang, Can Li, Hongxian Han, Ryuhei Nakamura

    Angewandte Chemie   131 ( 15 )   5108 - 5112   2019.4

    　More details

    Publishing type：Research paper (scientific journal)   Publisher：Wiley  

    DOI： 10.1002/ange.201813361

    researchmap

  • Stable Potential Windows for Long-Term Electrocatalysis by Manganese Oxides Under Acidic Conditions

    Ailong Li, Hideshi Ooka, Nadege Bonnet, Toru Hayashi, Yimeng Sun, Qike Jiang, Can Li, Hongxian Han, Ryuhei Nakamura

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION   58 ( 15 )   5054 - 5058   2019.4

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/anie.201813361

    Web of Science

    researchmap

  • Electrochemistry at Deep-Sea Hydrothermal Vents: Utilization of the Thermodynamic Driving Force towards the Autotrophic Origin of Life

    Hideshi Ooka, Shawn E. McGlynn, Ryuhei Nakamura

    CHEMELECTROCHEM   6 ( 5 )   1316 - 1323   2019.3

    　More details

  • Microfluidic Reactors for Carbon Fixation under Ambient-Pressure Alkaline-Hydrothermal-Vent Conditions

    Victor Sojo, Aya Ohno, Shawn E. McGlynn, Yoichi M. A. Yamada, Ryuhei Nakamura

    LIFE-BASEL   9 ( 1 )   2019.2

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.3390/life9010016

    Web of Science

    researchmap

  • Metals likely promoted protometabolism in early ocean alkaline hydrothermal systems Reviewed International journal

    Norio Kitadai, Ryuhei Nakamura, Masahiro Yamamoto, Ken Takai, Naohiro Yoshida, Yoshi Oono

    Science Advances   5 ( 6 )   eaav7848   2019

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1126/sciadv.aav7848

    Web of Science

    Scopus

    PubMed

    researchmap

  • Chemical Diversity of Metal Sulfide Minerals and Its Implications for the Origin of Life

    Yamei Li, Norio Kitadai, Ryuhei Nakamura

    LIFE-BASEL   8 ( 4 )   2018.12

    　More details

  • Design Strategy of Multi-electron Transfer Catalysts Based on a Bioinformatic Analysis of Oxygen Evolution and Reduction Enzymes

    Hideshi Ooka, Kazuhito Hashimoto, Ryuhei Nakamura

    MOLECULAR INFORMATICS   37 ( 8 )   2018.8

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/minf.201700139

    Web of Science

    researchmap

  • Deep-Sea Hydrothermal Fields as Natural Power Plants

    Masahiro Yamamoto, Ryuhei Nakamura, Ken Takai

    CHEMELECTROCHEM   5 ( 16 )   2162 - 2166   2018.8

    　More details

  • Preparation of Polyoxometalate-based Photo-responsive Membranes for the Photo-activation of Manganese Oxide Catalysts

    Akira Yamaguchi, Toshihiro Takashima, Kazuhito Hashimoto, Ryuhei Nakamura

    JOVE-JOURNAL OF VISUALIZED EXPERIMENTS   ( 138 )   2018.8

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.3791/58072

    Web of Science

    researchmap

  • Evidence that Crystal Facet Orientation Dictates Oxygen Evolution Intermediates on Rutile Manganese Oxide

    Hirotaka Kakizaki, Hideshi Ooka, Toru Hayashi, Akira Yamaguchi, Nadege Bonnet-Mercier, Kazuhito Hashimoto, Ryuhei Nakamura

    ADVANCED FUNCTIONAL MATERIALS   28 ( 24 )   2018.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/adfm.201706319

    Web of Science

    researchmap

  • Geoelectrochemical CO production: Implications for the autotrophic origin of life Reviewed International journal

    Norio Kitadai, Ryuhei Nakamura, Masahiro Yamamoto, Ken Takai, Yamei Li, Akira Yamaguchi, Alexis Gilbert, Yuichiro Ueno, Naohiro Yoshida, Yoshi Oono

    Science Advances   4 ( 4 )   eaao7265   2018.4

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1126/sciadv.aao7265

    Web of Science

    Scopus

    PubMed

    researchmap

  • Structural change of molybdenum sulfide facilitates the electrocatalytic hydrogen evolution reaction at neutral pH as revealed by in situ Raman spectroscopy

    Yamei Li, Ryuhei Nakamura

    CHINESE JOURNAL OF CATALYSIS   39 ( 3 )   401 - 406   2018.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/S1872-2067(17)62945-0

    Web of Science

    researchmap

  • Selective Electrocatalytic Reduction of Nitrite to Dinitrogen Based on Decoupled Proton-Electron Transfer

    Daoping He, Yamei Li, Hideshi Ookap, Yoo Kyung Go, Fangming Jin, Sun Hee Kim, Ryuhei Nakamura

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY   140 ( 6 )   2012 - 2015   2018.2

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/jacs.7b12774

    Web of Science

    researchmap

  • Anodic and Cathodic Extracellular Electron Transfer by the Filamentous Bacterium Ardenticatena maritima 110S

    Satoshi Kawaichi, Tetsuya Yamada, Akio Umezawa, Shawn E. McGlynn, Takehiro Suzuki, Naoshi Dohmae, Takashi Yoshida, Yoshihiko Sako, Nobuhiro Matsushita, Kazuhito Hashimoto, Ryuhei Nakamura

    FRONTIERS IN MICROBIOLOGY   9   2018.2

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.3389/fmicb.2018.00068

    Web of Science

    researchmap

  • New Method for Determination of Recoil Electron Vectors in Electron Tracking Compton Camera (ETCC)

    Ryuhei Nakamura, Hiroshi Ito

    2018 IEEE NUCLEAR SCIENCE SYMPOSIUM AND MEDICAL IMAGING CONFERENCE PROCEEDINGS (NSS/MIC)   2018

    　More details

    Language：English   Publishing type：Research paper (international conference proceedings)  

    Web of Science

    researchmap

  • Design of Metal-to-Metal Charge-Transfer Chromophores for Visible Light Activation of Oxygen-Evolving Mn Oxide Catalysts in a Polymer Film

    Akira Yamaguchi, Toshihiro Takashima, Kazuhito Hashimoto, Ryuhei Nakamura

    CHEMISTRY OF MATERIALS   29 ( 17 )   7234 - 7242   2017.9

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acs.chemmater.7b01669

    Web of Science

    researchmap

  • Efficiency of Oxygen Evolution on Iridium Oxide Determined from the pH Dependence of Charge Accumulation

    Hideshi Ooka, Akira Yamaguchi, Toshihiro Takashima, Kazuhito Hashimoto, Ryuhei Nakamura

    JOURNAL OF PHYSICAL CHEMISTRY C   121 ( 33 )   17873 - 17881   2017.8

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acs.jpcc.7b03749

    Web of Science

    researchmap

  • Element strategy of oxygen evolution electrocatalysis based on in situ spectroelectrochemistry

    Hideshi Ooka, Toshihiro Takashima, Akira Yamaguchi, Toru Hayashi, Ryuhei Nakamura

    CHEMICAL COMMUNICATIONS   53 ( 53 )   7149 - 7161   2017.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/c7cc02204b

    Web of Science

    researchmap

  • Spontaneous and Widespread Electricity Generation in Natural Deep-Sea Hydrothermal Fields

    Masahiro Yamamoto, Ryuhei Nakamura, Takafumi Kasaya, Hidenori Kumagai, Katsuhiko Suzuki, Ken Takai

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION   56 ( 21 )   5725 - 5728   2017.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/anie.201701768

    Web of Science

    researchmap

  • Mechanistic Investigation of Water Oxidation Catalyzed by Uniform, Assembled MnO Nanoparticles

    Kyoungsuk Jin, Hongmin Seo, Toru Hayashi, Mani Balamurugan, Donghyuk Jeong, Yoo Kyung Go, Jung Sug Hong, Kang Hee Cho, Hirotaka Kakizaki, Nadege Bonnet-Mercier, Min Gyu Kim, Sun Hee Kim, Ryuhei Nakamura, Ki Tae Nam

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY   139 ( 6 )   2277 - 2285   2017.2

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/jacs.6b10657

    Web of Science

    researchmap

  • Molybdenum Sulfide: A Bioinspired Electrocatalyst for Dissimilatory Ammonia Synthesis with Geoelectrical Current

    Yamei Li, Akira Yamaguchi, Masahiro Yamamoto, Ken Taka, Ryuhei Nakamura

    JOURNAL OF PHYSICAL CHEMISTRY C   121 ( 4 )   2154 - 2164   2017.2

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acs.jpcc.6b08343

    Web of Science

    researchmap

  • Mn酸化物の特異な電気化学的挙動から見えてきた高活性酸素発生触媒の創製への指針 Reviewed

    髙嶋敏宏, 山口晃, 中村龍平, 橋本和仁

    ELECTROCHEMISTRY   85 ( 1 )   34 - 39   2016.12

    　More details

    Language：Japanese   Publishing type：Research paper (scientific journal)  

    DOI： 10.5796/electrochemistry.85.34

    CiNii Books

    researchmap

  • Legitimate intermediates of oxygen evolution on iridium oxide revealed by in situ electrochemical evanescent wave spectroscopy

    Hideshi Ooka, Yuanqing Wang, Akira Yamaguchi, Makoto Hatakeyama, Shinichiro Nakamura, Kazuhito Hashimoto, Ryuhei Nakamura

    PHYSICAL CHEMISTRY CHEMICAL PHYSICS   18 ( 22 )   15199 - 15204   2016.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/c6cp02385a

    Web of Science

    researchmap

  • Extracellular Electron Transfer of Pseudomonas stutzeri Driven by Lithotrophic and Mixotrophic Denitrification

    Tetsuya Yamada, Satoshi Kawaichi, Akihisa Matsuyama, Minoru Yoshida, Nobuhiro Matsushita, Ryuhei Nakamura

    ELECTROCHEMISTRY   84 ( 5 )   312 - 314   2016.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.5796/electrochemistry.84.312

    Web of Science

    researchmap

  • Stability of organic compounds on the oxygen-evolving center of photosystem II and manganese oxide water oxidation catalysts

    Toru Hayashi, Akira Yamaguchi, Kazuhito Hashimoto, Ryuhei Nakamura

    CHEMICAL COMMUNICATIONS   52 ( 95 )   13760 - 13763   2016

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/c6cc07092b

    Web of Science

    researchmap

  • CO2 Reduction Using an Electrochemical Approach from Chemical, Biological, and Geological Aspects in the Ancient and Modern Earth

    ryuhei nakamura

    Energy Harvesting and Energy Efficiency: Technology, Methods, and Applications   2016

    　More details

    Publishing type：Research paper (scientific journal)  

    DOI： 10.1007/978-3-319-25400-5_13

    Web of Science

    researchmap

  • Water Splitting Using Electrochemical Approach

    ryuhei nakamura

    Energy Harvesting and Energy Efficiency: Technology, Methods, and Applications   2016

    　More details

    Publishing type：Research paper (scientific journal)  

    DOI： 10.1007/978-3-319-25400-5_11

    Web of Science

    researchmap

  • Thermoelectricity Generation and Electron-Magnon Scattering in a Natural Chalcopyrite Mineral from a Deep-Sea Hydrothermal Vent

    Ran Ang, Atta Ullah Khan, Naohito Tsujii, Ken Takai, Ryuhei Nakamura, Takao Mori

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION   54 ( 44 )   12909 - 12913   2015.10

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/anie.201505517

    Web of Science

    researchmap

  • Microbial Electrochemical Technologies Producing Electricity and Valuable Chemicals from Biodegradation of Waste Organic Matters Reviewed

    Taeho Lee, Kazuya Watanabe, Ryuhei Nakamura, Jung Rae Kim, Kazuhito Hashimoto, Akihiro Okamoto, Sokhee Jung

    Manual of Environmental Microbiology, 4th Edition   5.1.4 - 1   2015.9

    　More details

    Publishing type：Part of collection (book)   Publisher：American Society of Microbiology  

    DOI： 10.1128/9781555818821.ch5.1.4

    researchmap

  • From chemolithoautotrophs to electrolithoautotrophs: CO2 fixation by Fe(II)-oxidizing bacteria coupled with direct uptake of electrons from solid electron sources

    Takumi Ishii, Satoshi Kawaichi, Hirotaka Nakagawa, Kazuhito Hashimoto, Ryuhei Nakamura

    FRONTIERS IN MICROBIOLOGY   6   2015.9

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.3389/fmicb.2015.00994

    Web of Science

    researchmap

  • Draft Genome Sequence of a Heterotrophic Facultative Anaerobic Thermophilic Bacterium, Ardenticatena maritima Strain 110S(T)

    Satoshi Kawaichi, Takashi Yoshida, Yoshihiko Sako, Ryuhei Nakamura

    GENOME ANNOUNCEMENTS   3 ( 5 )   2015.9

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1128/genomeA.01145-15

    Web of Science

    researchmap

  • Electron Extraction from an Extracellular Electrode by Desulfovibrio ferrophilus Strain IS5 Without Using Hydrogen as an Electron Carrier

    Xiao Deng, Ryuhei Nakamura, Kazuhito Hashimoto, Akihiro Okamoto

    ELECTROCHEMISTRY   83 ( 7 )   529 - 531   2015.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.5796/electrochemistry.83.529

    Web of Science

    researchmap

  • Sulfur-Mediated Electron Shuttling Sustains Microbial Long-Distance Extracellular Electron Transfer with the Aid of Metallic Iron Sulfides

    Katsuhito Kondo, Akihiro Okamoto, Kazuhito Hashimoto, Ryuhei Nakamura

    LANGMUIR   31 ( 26 )   7427 - 7434   2015.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/acs.langmuir.5b01033

    Web of Science

    researchmap

  • Bound Flavin Model Suggests Similar Electron-Transfer Mechanisms in Shewanella and Geobacter

    Akihiro Okamoto, Ryuhei Nakamura, Kenneth H. Nealson, Kazuhito Hashimoto

    CHEMELECTROCHEM   1 ( 11 )   1808 - 1812   2014.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/celc.201402151

    Web of Science

    researchmap

  • Electrochemical CO2 Reduction by Ni-containing Iron Sulfides: How Is CO2 Electrochemically Reduced at Bisulfide-Bearing Deep-sea Hydrothermal Precipitates?

    Akira Yamaguchi, Masahiro Yamamoto, Ken Takai, Takumi Ishii, Kazuhito Hashimoto, Ryuhei Nakamura

    ELECTROCHIMICA ACTA   141   311 - 318   2014.9

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.electacta.2014.07.078

    Web of Science

    researchmap

  • Cell-secreted Flavins Bound to Membrane Cytochromes Dictate Electron Transfer Reactions to Surfaces with Diverse Charge and pH

    Akihiro Okamoto, Shafeer Kalathil, Xiao Deng, Kazuhito Hashimoto, Ryuhei Nakamura, Kenneth H. Nealson

    SCIENTIFIC REPORTS   4   2014.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/srep05628

    Web of Science

    researchmap

  • Regulating proton-coupled electron transfer for efficient water splitting by manganese oxides at neutral pH

    Akira Yamaguchi, Riko Inuzuka, Toshihiro Takashima, Toru Hayashi, Kazuhito Hashimoto, Ryuhei Nakamura

    NATURE COMMUNICATIONS   5   2014.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/ncomms5256

    Web of Science

    researchmap

  • In situ UV-vis Absorption Spectra of Intermediate Species for Oxygen-Evolution Reaction on the Surface of MnO2 in Neutral and Alkaline Media

    Toshihiro Takashima, Akira Yamaguchi, Kazuhito Hashimoto, Hiroshi Irie, Ryuhei Nakamura

    ELECTROCHEMISTRY   82 ( 5 )   325 - 327   2014.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.5796/electrochemistry.82.325

    Web of Science

    researchmap

  • Uptake of self-secreted flavins as bound cofactors for extracellular electron transfer in Geobacter species

    Akihiro Okamoto, Koichiro Saito, Kengo Inoue, Kenneth H. Nealson, Kazuhito Hashimoto, Ryuhei Nakamura

    ENERGY & ENVIRONMENTAL SCIENCE   7 ( 4 )   1357 - 1361   2014.4

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/c3ee43674h

    Web of Science

    researchmap

  • Light-induced cell aggregation of Euglena gracilis towards economically feasible biofuel production

    Hideshi Ooka, Takumi Ishii, Kazuhito Hashimoto, Ryuhei Nakamura

    RSC ADVANCES   4 ( 40 )   20693 - 20698   2014

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/c4ra02101k

    Web of Science

    researchmap

  • Generation of Electricity and Illumination by an Environmental Fuel Cell in Deep-Sea Hydrothermal Vents

    Masahiro Yamamoto, Ryuhei Nakamura, Kazumasa Oguri, Shinsuke Kawagucci, Katsuhiko Suzuki, Kazuhito Hashimoto, Ken Takai

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION   52 ( 41 )   10758 - 10761   2013.10

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/anie.201302704

    Web of Science

    researchmap

  • Nitrogen-doped carbon nanomaterials as non-metal electrocatalysts for water oxidation

    Yong Zhao, Ryuhei Nakamura, Kazuhide Kamiya, Shuji Nakanishi, Kazuhito Hashimoto

    NATURE COMMUNICATIONS   4   2013.8

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1038/ncomms3390

    Web of Science

    researchmap

  • Extracellular Electron Transfer across Bacterial Cell Membranes via a Cytocompatible Redox-Active Polymer

    Koichi Nishio, Ryuhei Nakamura, Xiaojie Lin, Tomohiro Konno, Kazuhiko Ishihara, Shuji Nakanishi, Kazuhito Hashimoto

    CHEMPHYSCHEM   14 ( 10 )   2159 - 2163   2013.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/cphc.201300117

    Web of Science

    researchmap

  • Rate enhancement of bacterial extracellular electron transport involves bound flavin semiquinones

    Akihiro Okamoto, Kazuhito Hashimoto, Kenneth H. Nealson, Ryuhei Nakamura

    PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA   110 ( 19 )   7856 - 7861   2013.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1073/pnas.1220823110

    Web of Science

    researchmap

  • Mechanisms of long-distance extracellular electron transfer of metal-reducing bacteria mediated by nanocolloidal semiconductive iron oxides

    Ryuhei Nakamura, Fumiyoshi Kai, Akihiro Okamoto, Kazuhito Hashimoto

    JOURNAL OF MATERIALS CHEMISTRY A   1 ( 16 )   5148 - 5157   2013

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/c3ta01672b

    Web of Science

    researchmap

  • Low-voltage electrochemical CO2 reduction by bacterial voltage-multiplier circuits

    Taketo Mogi, Takumi Ishii, Kazuhito Hashimoto, Ryuhei Nakamura

    CHEMICAL COMMUNICATIONS   49 ( 38 )   3967 - 3969   2013

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/c2cc37986d

    Web of Science

    researchmap

  • 2P015 Respiratory Electron Flow Enhances the Rate of Extracellular Electron Transport Processes in Current-Producing Bacteria(01A. Protein: Structure,Poster)

    Okamoto Akihiro, Nakamura Ryuhei, Nealson Kenneth H., Hashimoto Kazuhito

    Seibutsu Butsuri   53 ( 1 )   S161   2013

    　More details

    Language：English   Publisher：The Biophysical Society of Japan General Incorporated Association  

    DOI： 10.2142/biophys.53.S161_3

    researchmap

  • Inhibition of Charge Disproportionation of MnO2 Electrocatalysts for Efficient Water Oxidation under Neutral Conditions

    Toshihiro Takashima, Kazuhito Hashimoto, Ryuhei Nakamura

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY   134 ( 44 )   18153 - 18156   2012.11

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/ja306499n

    Web of Science

    researchmap

  • Long-range electron conduction of Shewanella biofilms mediated by outer membrane C-type cytochromes

    Akihiro Okamoto, Kazuhito Hashimoto, Ryuhei Nakamura

    BIOELECTROCHEMISTRY   85   61 - 65   2012.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.bioelechem.2011.12.003

    Web of Science

    researchmap

  • Acidithiobacillus ferrooxidans as a bioelectrocatalyst for conversion of atmospheric CO 2into extracellular pyruvic acid

    Takumi Ishii, Hirotaka Nakagawa, Kazuhito Hashimoto, Ryuhei Nakamura

    Electrochemistry   80 ( 5 )   327 - 329   2012.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.5796/electrochemistry.80.327

    Scopus

    researchmap

  • Mechanisms of pH-Dependent Activity for Water Oxidation to Molecular Oxygen by MnO2 Electrocatalyst

    Toshihiro Takashima, Kazuhito Hashimoto, Ryuhei Nakamura

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY   134 ( 3 )   1519 - 1527   2012.1

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/ja206511w

    Web of Science

    researchmap

  • Spectroelectrochemical Investigation on Biological Electron Transfer Associated with Anode Performance in Microbial Fuel Cells Reviewed

    Okamoto Akihiro, Hashimoto Kazuhito, Nakamura Ryuhei

    Recent Trend in Electrochemical Science and Technology   2012.1

    　More details

    Publisher：InTech  

    DOI： 10.5772/34905

    researchmap

  • Multielectron-transfer reactions at single Cu(II) centers embedded in polyoxotungstates driven by photo-induced metal-to-metal charge transfer from anchored Ce(III) to framework W(VI)

    Toshihiro Takashima, Akira Yamaguchi, Kazuhito Hashimoto, Ryuhei Nakamura

    CHEMICAL COMMUNICATIONS   48 ( 24 )   2964 - 2966   2012

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1039/c2cc17759e

    Web of Science

    researchmap

  • Visible-Light-Absorbing Lindqvist-Type Polyoxometalates as Building Blocks for All-Inorganic Photosynthetic Assemblies

    Toshihiro Takashima, Ryuhei Nakamura, Kazuhito Hashimota

    ELECTROCHEMISTRY   79 ( 10 )   783 - 786   2011.10

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.5796/electrochemistry.79.783

    Web of Science

    researchmap

  • In-vivo identification of direct electron transfer from Shewanella oneidensis MR-1 to electrodes via outer-membrane OmcA-MtrCAB protein complexes

    Akihiro Okamoto, Ryuhei Nakamura, Kazuhito Hashimoto

    ELECTROCHIMICA ACTA   56 ( 16 )   5526 - 5531   2011.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.electacta.2011.03.076

    Web of Science

    researchmap

  • In Vivo Participation of Artificial Porphyrins in Electron-Transport Chains: Electrochemical and Spectroscopic Analyses of Microbial Metabolism

    Shigeki Mori, Kazuyuki Ishii, Yuichiro Hirakawa, Ryuhei Nakamura, Kazuhito Hashimoto

    INORGANIC CHEMISTRY   50 ( 6 )   2037 - 2039   2011.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/ic100342k

    Web of Science

    researchmap

  • Electrical current generation in deep-sea hydrothermal vents: new ideas for origin of life

    Yamamoto Masahiro, Nakamura Ryuhei, Takashima Toshihiro, Kato Souichiro, Hashimoto Kazuhito, Takai Ken

    Abstracts of Annual Meeting of the Geochemical Society of Japan   58   57 - 57   2011

    　More details

    Publisher：GEOCHEMICAL SOCIETY OF JAPAN  

    DOI： 10.14862/geochemproc.58.0.57.0

    researchmap

  • Observation of In Vivo Cytochrome-Based Electron-Transport Dynamics Using Time-Resolved Evanescent Wave Electroabsorption Spectroscopy

    Toshihiko Shibanuma, Ryuhei Nakamura, Yuichiro Hirakawa, Kazuhito Hashimoto, Kazuyuki Ishii

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION   50 ( 39 )   9137 - 9140   2011

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/anie.201101810

    Web of Science

    researchmap

  • Respiratory interactions of soil bacteria with (semi)conductive iron-oxide minerals

    Souichiro Kato, Ryuhei Nakamura, Fumiyoshi Kai, Kazuya Watanabe, Kazuhito Hashimoto

    ENVIRONMENTAL MICROBIOLOGY   12 ( 12 )   3114 - 3123   2010.12

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1111/j.1462-2920.2010.02284.x

    Web of Science

    researchmap

  • Direct electron-transfer conduits constructed at the interface between multicopper oxidase and nanocrystalline semiconductive Fe oxides

    Ryuhei Nakamura, Kazuhide Kamiya, Kazuhito Hashimoto

    CHEMICAL PHYSICS LETTERS   498 ( 4-6 )   307 - 311   2010.10

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.cplett.2010.08.074

    Web of Science

    researchmap

  • Cover Picture: Biological Iron-Monosulfide Production for Efficient Electricity Harvesting from a Deep-Sea Metal-Reducing Bacterium (ChemBioChem 5/2010) Reviewed

    Ryuhei Nakamura, Akihiro Okamoto, Nozomi Tajima, Greg J. Newton, Fumiyoshi Kai, Toshihiro Takashima, Kazuhito Hashimoto

    ChemBioChem   11 ( 5 )   589   2010.3

    　More details

    Publisher：Wiley  

    DOI： 10.1002/cbic.201090015

    researchmap

  • Biological Iron-Monosulfide Production for Efficient Electricity Harvesting from a Deep-Sea Metal-Reducing Bacterium

    Ryuhei Nakamura, Akihiro Okamoto, Nozomi Tajima, Greg J. Newton, Fumiyoshi Kai, Toshihiro Takashima, Kazuhito Hashimoto

    CHEMBIOCHEM   11 ( 5 )   643 - 645   2010.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/cbic.200900775

    Web of Science

    researchmap

  • Molecular Mechanism of Water Oxidation Reaction at Photo-irradiated TiO(2) and Related Metal Oxide Surfaces

    ryuhei nakamura

    Solid State Phenomena   2010

    　More details

    Publishing type：Research paper (scientific journal)  

    DOI： 10.4028/WWW.SCIENTIFIC.NET/SSP.162.1

    Web of Science

    researchmap

  • Three-Dimensional Conductive Nanowire Networks for Maximizing Anode Performance in Microbial Fuel Cells

    Yong Zhao, Kazuya Watanabe, Ryuhei Nakamura, Shigeki Mori, Huan Liu, Kazuyuki Ishii, Kazuhito Hashimoto

    CHEMISTRY-A EUROPEAN JOURNAL   16 ( 17 )   4982 - 4985   2010

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/chem.200903486

    Web of Science

    researchmap

  • Electrical Current Generation across a Black Smoker Chimney

    Ryuhei Nakamura, Toshihiro Takashima, Souichiro Kato, Ken Takai, Masahiro Yamamoto, Kazuhito Hashimoto

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION   49 ( 42 )   7692 - 7694   2010

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/anie.201003311

    Web of Science

    researchmap

  • Electrochemical Characterization of a Single Electricity-Producing Bacterial Cell of Shewanella by Using Optical Tweezers

    Huan Liu, Greg J. Newton, Ryuhei Nakamura, Kazuhito Hashimoto, Shuji Nakanishi

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION   49 ( 37 )   6596 - 6599   2010

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/anie.201000315

    Web of Science

    researchmap

  • Analyses of Current-Generating Mechanisms of Shewanella loihica PV-4 and Shewanella oneidensis MR-1 in Microbial Fuel Cells

    Gregory J. Newton, Shigeki Mori, Ryuhei Nakamura, Kazuhito Hashimoto, Kazuya Watanabe

    APPLIED AND ENVIRONMENTAL MICROBIOLOGY   75 ( 24 )   7674 - 7681   2009.12

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1128/AEM.01142-09

    Web of Science

    researchmap

  • Visible Light Sensitive Metal Oxide Nanocluster Photocatalysts: Photo-Induced Charge Transfer from Ce(III) to Keggin-Type Polyoxotungstates

    Toshihiro Takashima, Ryuhei Nakamura, Kazuhito Hashimoto

    JOURNAL OF PHYSICAL CHEMISTRY C   113 ( 39 )   17247 - 17253   2009.10

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/jp9047049

    Web of Science

    researchmap

  • In vivo Electrochemistry of C-Type Cytochrome-Mediated Electron-Transfer with Chemical Marking

    Akihiro Okamoto, Ryuhei Nakamura, Kazuyuki Ishii, Kazuhito Hashimoto

    CHEMBIOCHEM   10 ( 14 )   2329 - 2332   2009.9

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/cbic.200900422

    Web of Science

    researchmap

  • Self-Constructed Electrically Conductive Bacterial Networks Reviewed

    Ryuhei Nakamura, Fumiyoshi Kai, Akihiro Okamoto, Greg{\hspace, m } }J. Newton, Kazuhito Hashimoto

    Angewandte Chemie   121 ( 3 )   516   2009.1

    　More details

    Publisher：Wiley  

    DOI： 10.1002/ange.200804750

    researchmap

  • Self-Constructed Electrically Conductive Bacterial Networks

    Ryuhei Nakamura, Fumiyoshi Kai, Akihiro Okamoto, Greg J. Newton, Kazuhito Hashimoto

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION   48 ( 3 )   508 - 511   2009

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/anie.200804750

    Web of Science

    researchmap

  • Electronic Absorption Spectra and Redox Properties of C Type Cytochromes in Living Microbes

    Ryuhei Nakamura, Kazuyuki Ishii, Kazuhito Hashimoto

    ANGEWANDTE CHEMIE-INTERNATIONAL EDITION   48 ( 9 )   1606 - 1608   2009

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/anie.200804917

    Web of Science

    researchmap

  • Anchored Oxo-Bridged Bimetallic Complexes, (SiO)(3)-Ti-O-Fe(corrole), on Silica Mesopores as Multi-Electron-Transfer Photosystems

    Akihiro Okamoto, Ryuhei Nakamura, Hitoshi Osawa, Kazuhito Hashimoto

    JOURNAL OF PHYSICAL CHEMISTRY C   112 ( 49 )   19777 - 19783   2008.12

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/jp8064932

    Web of Science

    researchmap

  • Highly active photocatalyst Bi(x)Ti(y)V(x)O(4x+2y) (x approximate to y) for oxygen evolution under visible-light illumination

    Haimei Liu, Akihito Imanishi, Ryuhei Nakamura, Yoshihiro Nakato

    PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS   245 ( 9 )   1807 - 1815   2008.9

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1002/pssb.200879535

    Web of Science

    researchmap

  • Site-specific synthesis of oxo-bridged mixed-valence binuclear complexes on mesoporous silica

    Akihiro Okamoto, Ryuhei Nakamura, Hitoshi Osawa, Kazuhito Hashimoto

    LANGMUIR   24 ( 13 )   7011 - 7017   2008.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/la704032c

    Web of Science

    researchmap

  • A novel visible-light-sensitive efficient photocatalyst, Cr-III-grafted TiO2

    Hiroshi Irie, Shuhei Miura, Ryuhei Nakamura, Kazuhito Hashimoto

    CHEMISTRY LETTERS   37 ( 3 )   252 - 253   2008.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1246/cl.2008.252

    Web of Science

    researchmap

  • Mechanism of water photooxidation reaction at atomically flat TiO2 (rutile) (110) and (100) surfaces: Dependence on solution pH

    Akihito Imanishi, Tomoaki Okamura, Naomichi Ohashi, Ryuhei Nakamura, Yoshihiro Nakato

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY   129 ( 37 )   11569 - 11578   2007.9

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/ja073206+

    Web of Science

    researchmap

  • Design of all-inorganic molecular-based photocatalysts sensitive to visible light: Ti(IV)-O-Ce(III) bimetallic assemblies on mesoporous silica

    Ryuhei Nakamura, Akihiro Okamoto, Hitoshi Osawa, Hiroshi Irie, Kazuhito Hashimoto

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY   129 ( 31 )   9596 - +   2007.8

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/ja073668n

    Web of Science

    researchmap

  • Ordered nanogroove arrays on n-TiO2 with a variation of the groove depth, formed by self-organized photoetching

    Shuji Nakanishi, Takatoshi Tanaka, Yuichiro Saji, Etsushi Tsuji, Satoshi Fukushima, Kazuhiro Fukami, Tomoyuki Nagai, Ryuhei Nakamura, Akihito Imanishi, Yoshihiro Nakato

    JOURNAL OF PHYSICAL CHEMISTRY C   111 ( 10 )   3934 - 3937   2007.3

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/jp067549q

    Web of Science

    researchmap

  • Visible light-driven water oxidation by Ir oxide clusters coupled to single Cr centers in mesoporous silica

    Ryuhei Nakamura, Heinz Frei

    JOURNAL OF THE AMERICAN CHEMICAL SOCIETY   128 ( 33 )   10668 - 10669   2006.8

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/ja0625632

    Web of Science

    researchmap

  • A Visible-Light Responsive Photocatalyst, BiZn[sub 2]VO[sub 6], for Efficient Oxygen Photoevolution from Aqueous Particulate Suspensions

    ryuhei nakamura

    Electrochemical and Solid-State Letters   2006

    　More details

    Publishing type：Research paper (scientific journal)  

    DOI： 10.1149/1.2184496

    Web of Science

    researchmap

  • Molecular mechanisms of photoinduced oxygen evolution, PL emission, and surface roughening at atomically smooth (110) and (100) n-TiO<inf>2</inf> (rutile) surfaces in aqueous acidic solutions Reviewed

    Ryuhei Nakamura, Tomoaki Okamura, Naomichi Ohashi, Akihito Imanishi, Yoshihiro Nakato

    Journal of the American Chemical Society   127 ( 37 )   12975 - 12983   2005.9

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/ja053252e

    Web of Science

    Scopus

    PubMed

    researchmap

  • Oxygen Photoevolution on a Tantalum Oxynitride Photocatalyst under Visible-Light Irradiation:  How Does Water Photooxidation Proceed on a Metal−Oxynitride Surface?

    ryuhei nakamura

    The Journal of Physical Chemistry B   2005.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/jp0501289

    researchmap

  • Visible-light sensitization of TiO2 photocatalysts by wet-method N doping

    ryuhei nakamura

    Applied Catalysis A: General   2005.4

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.apcata.2005.01.028

    researchmap

  • Crystal-face dependences of surface band edges and hole reactivity, revealed by preparation of essentially atomically smooth and stable (110) and (100) n-TiO<inf>2</inf> (rutile) surfaces Reviewed

    Ryuhei Nakamura, Naomichi Ohashi, Akihito Imanishi, Takeo Osawa, Yuji Matsumoto, Hideomi Koinuma, Yoshihiro Nakato

    Journal of Physical Chemistry B   109 ( 5 )   1648 - 1651   2005.2

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/jp044710t

    Web of Science

    Scopus

    researchmap

  • Bismuth-copper vanadate BiCu2VO6 as a novel photocatalyst for efficient visible-light-driven oxygen evolution

    Haimei Liu, Ryuhei Nakamura, Yoshihiro Nakato

    ChemPhysChem   6 ( 12 )   2499 - 2502   2005

    　More details

    Language：English   Publishing type：Research paper (scientific journal)   Publisher：Wiley-VCH Verlag  

    DOI： 10.1002/cphc.200500278

    Scopus

    researchmap

  • Promoted Photo-oxidation Reactivity of Particulate BiVO[sub 4] Photocatalyst Prepared by a Photoassisted Sol-gel Method

    ryuhei nakamura

    Journal of The Electrochemical Society   2005

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1149/1.2051868

    researchmap

  • A nano-modified Si/TiO2 composite electrode for efficient solar water splitting

    Susumu Takabayashi, Ryuhei Nakamura, Yoshihiro Nakato

    Journal of Photochemistry and Photobiology A: Chemistry   166 ( 1-3 )   107 - 113   2004.8

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1016/j.jphotochem.2004.04.037

    Scopus

    researchmap

  • Mechanism for Visible Light Responses in Anodic Photocurrents at N-Doped TiO2Film Electrodes

    ryuhei nakamura

    The Journal of Physical Chemistry B   2004.7

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/jp048112q

    researchmap

  • Primary Intermediates of Oxygen Photoevolution Reaction on TiO2(Rutile) Particles, Revealed by in Situ FTIR Absorption and Photoluminescence Measurements

    ryuhei nakamura

    Journal of the American Chemical Society   2004.2

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/ja0388764

    researchmap

  • In situ FTIR studies of pimary intermediates of photocatalytic reactions on nanocrystalline TiO<inf>2</inf> films in contact with aqueous solutions Reviewed

    Ryuhei Nakamura, Akihito Imanishi, Kei Murakoshi, Yoshihiro Nakato

    Journal of the American Chemical Society   125 ( 24 )   7443 - 7450   2003.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/ja029503q

    Web of Science

    Scopus

    researchmap

  • In Situ IR Observation of Surface Species during the Photocatalytic Decomposition of Acetic Acid over TiO2Films

    ryuhei nakamura

    The Journal of Physical Chemistry B   2002.9

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/jp013533i

    researchmap

  • Oxygen Species Active for Photooxidation ofn-Decane over TiO2Surfaces

    ryuhei nakamura

    The Journal of Physical Chemistry B   2002.6

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/jp013784r

    researchmap

  • Surface-Enhanced IR Absorption of Pt and Its Application to In Situ Analysis of Surface Species

    ryuhei nakamura

    Langmuir   2002.5

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/la015709d

    researchmap

  • In Situ Observation of the Photoenhanced Adsorption of Water on TiO2Films by Surface-Enhanced IR Absorption Spectroscopy

    ryuhei nakamura

    Langmuir   2001.4

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/la0016118

    researchmap

  • Preparation of Platinum Nanoparticles in Ethyl Acetate in the Presence of Poly(amidoamine) dendrimers with a Methyl Ester Terminal Group

    ryuhei nakamura

    Langmuir   2000.10

    　More details

    Language：English   Publishing type：Research paper (scientific journal)  

    DOI： 10.1021/la0005006

    researchmap

▼display all

MISC

  • クルマエビはどのような底質を好むのか?-酸化還元状態を指標とした検証-

    伊藤真奈, 佐藤琢, 菅谷琢磨, 中村龍平, 伊藤克敏

    日本水産学会大会講演要旨集(CD-ROM)   2024   2024

    　More details

  • Design of pressure variable high temperature electrochemical system and application for OER catalyst

    大坪由貴, 山口晃, 北台紀夫, 中村龍平, 中村龍平, 宮内雅浩

    電気化学会大会講演要旨集(CD-ROM)   87th   2020

    　More details

  • MnO2電極触媒の塩基存在下における酸素発生能の結晶面依存性の検討

    濱口陽介, 山口晃, 山口晃, 柿崎宏昂, 橋本和仁, 橋本和仁, 中村龍平, 中村龍平, 宮内雅浩

    セラミックス基礎科学討論会講演要旨集   56th   2018

    　More details

  • Power generation using electric discharge on deep-sea hydrothermal field

    Yamamoto Masahiro, Nakamura Ryuhei, Kasaya Takafumi, Kumagai Hidenori, Suzuki Katsuhiko, Takai Ken

    Abstracts of Annual Meeting of the Geochemical Society of Japan   64 ( 0 )   146 - 146   2017

    　More details

    Language：Japanese   Publisher：GEOCHEMICAL SOCIETY OF JAPAN  

    &lt;p&gt;&lt;/p&gt;

    DOI： 10.14862/geochemproc.64.0_146

    researchmap

  • 第一周期遷移金属元素の不均化特性制御に基づく多電子酸化反応触媒の設計

    山口晃, 山口晃, 浜口陽介, 柿崎宏昂, 橋本和仁, 橋本和仁, 中村龍平, 中村龍平, 宮内雅浩

    電気化学秋季大会講演要旨集(CD-ROM)   2017   2017

    　More details

  • Encapsulation of shewanella in the redox phospholipid polymer hydrogel for microbial fuel cell fabrication

    LIN Xiaojie, NISHIO Koichi, NAKAMURA Ryuhei, KONNO Tomohiro, HASHIMOTO Kazuhito, ISHIHARA Kazuhiko

    Trans Mater Res Soc Jpn   37 ( 4 )   529 - 532   2012.12

    　More details

    Language：English   Publisher：The Materials Research Society of Japan  

    In this research, encapsulation of Shewanella oneidensis MR-1 in the phospholipid polymer hydrogel and electrochemical property of the hydrogel with immobilized shewanella was investigated. Cytocompatible and electron transfer mediated polymer based on the water-soluble phospholipid polymer, poly(2-methacryloyloxyethyl phosphorylcholine (MPC)-co-n-butyl  methacrylate  (BMA)-co-p-vinylphenylboronic   acid (VPBA)-co-vinylferrocene (VFc)) (PMBVF) was synthesized by conventional radical polymerization method. Shewanella which have the ability to  generate  and  transfer extracellular electron without any external  mediator,  have  significant  potential  on  the fabrication of microbial fuel cell. The water-soluble PMBVF was dissolved in the cell culture medium containing shewanella cells. Poly(vinyl alcohol) (PVA) solution was added to the PMBVF solution with gently mixing, in which case, a reversible PMBVF/PVA hydrogel with encapsulated shewanella was obtained. The viability of the encapsulated shewanella was calculated by the fluorescence microscopy. The electrochemical property of the PMBVF/PVA hydrogel containing shewanella was measured by cyclic voltammograms (CV) and amperometric i-t curve. PMBVF/PVA hydrogel can  provide  mild  environment  for  the shewanella and maintain the cellular function for longtime. The generated current was higher than that cultured with normal medium.

    DOI： 10.14723/tmrsj.37.529

    J-GLOBAL

    researchmap

  • 生体親和型・酸化還元活性ポリマーによる微生物細胞―電極間の電子輸送

    西尾晃一, 中村龍平, 中西周次, LIN Xiaojie, 金野智浩, 石原一彦, 橋本和仁

    日本生物工学会大会講演要旨集   64th   68 - 68   2012.9

    　More details

    Language：Japanese   Publisher：(公社)日本生物工学会  

    CiNii Books

    J-GLOBAL

    researchmap

  • 103a-5 導電性酸化鉄を介した異種微生物間電子伝達による共生的メタン生成(103a 遺伝子伝播/共生/相互作用/生理/代謝/増殖,口頭発表)

    加藤,創一郎, 中村,龍平, 渡邉,一哉, 橋本,和仁

    日本微生物生態学会講演要旨集   57   2011.10

    　More details

    Language：Japanese   Publisher：日本微生物生態学会  

    CiNii Books

    CiNii Research

    researchmap

  • 1A-4 Possible electrolithotrophy sustained by electrical current generation across a black smoker chimney(Oral Session)

    NAKAMURA,RYUHEI, TAKASHIMA,TOSHIHIRO, KATO,SOUICHIRO, TAKAI,KEN, YAMAMOTO,MASAHIRO, HASHIMOTO,KAZUHITO

    62   2010.11

    　More details

  • 1B-14 電流産生微生物群集と半導体酸化鉄との相互作用(口頭発表)

    加藤,創一郎, 甲斐,文祥, 中村,龍平, 渡邉,一哉, 橋本,和仁

    日本微生物生態学会講演要旨集   15   2009.11

    　More details

    Language：Japanese   Publisher：日本微生物生態学会  

    CiNii Books

    CiNii Research

    researchmap

▼display all

Research Projects

  • Chemistry of the CO world

    Grant number：22H05153  2022.6 - 2027.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Transformative Research Areas (A)

    　 More details

    Grant amount：\303420000 （ Direct Cost: \233400000 、 Indirect Cost：\70020000 ）

    researchmap

  • Biogeochemistry of CO world

    Grant number：22H05149  2022.6 - 2027.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Transformative Research Areas (A)

    　 More details

    Grant amount：\248430000 （ Direct Cost: \191100000 、 Indirect Cost：\57330000 ）

    researchmap

  • pH Gradient Dependent Geo-Electrochemical Origin of Life on Aqua Planets in the Universe

    Grant number：22K18278  2022.6 - 2025.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Challenging Research (Pioneering)

    　 More details

    Grant amount：\25740000 （ Direct Cost: \19800000 、 Indirect Cost：\5940000 ）

    researchmap

  • Creation of sustainable oxygen evolution catalysts based on the control of catalytic reaction networks

    Grant number：22H00339  2022.4 - 2025.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (A)

    　 More details

    Grant amount：\35750000 （ Direct Cost: \27500000 、 Indirect Cost：\8250000 ）

    researchmap

  • 自然界に存在する汚染耐性底質のメカニズム解明‐海洋底質を鍛錬する方法を学ぶ‐

    Grant number：20K21871  2020.7 - 2023.3

    日本学術振興会  科学研究費助成事業  挑戦的研究(萌芽)

    伊藤 克敏, 中村 龍平, 伊藤 真奈

    　 More details

    Grant amount：\6500000 （ Direct Cost: \5000000 、 Indirect Cost：\1500000 ）

    本研究では、【実験１】①「浄化能が強化される底質」、【実験２】②「電位操作により浄化が著しく促進される底質」のメカニズムを解明することを目的とする。令和３年度は、主に【実験１】①「浄化能が強化される底質」に取り組んだ。具体的には、養殖場から採取した底質を、ガラス電極（フッ素ドープ酸化スズ（FTO）電極）を用いて電位測定な可能なリアクター内に入れ、有機物を負荷した際の底質電位および底質汚染の重要な指標である酸揮発性硫化物量（AVS）について経時的に観測した。有機物を負荷した際の電位挙動とAVSの関係を詳細に検討した結果、AVSは電位の一時データよりも、積算値（10分間隔で測定した値の合計値）との相関性が高いことが明らかとなった。

    researchmap

  • 赤潮プランクトン休眠細胞の「目覚め」を電気化学操作で制御：電位応答発芽機構の解明

    Grant number：20H03068  2020.4 - 2024.3

    日本学術振興会  科学研究費助成事業  基盤研究(B)

    伊藤 真奈, 中村 龍平, 羽野 健志, 坂本 節子

    　 More details

    Grant amount：\17550000 （ Direct Cost: \13500000 、 Indirect Cost：\4050000 ）

    海洋の底質中に蓄積する有毒プランクトンのシストの発芽は、酸素や光など様々な環境因子によって制御されている。本研究ではシストの発芽応答に影響を及ぼす電位の特定および作用機序を明らかにすることを目的としている。昨年度、試験系の参照極から溶出する銀によるプランクトンへの毒性影響が当初の想定以上に高いことが明らかとなった事から、参照極を使用しない２極系の試験系を確立した。本試験系にて培養で形成したプランクトンシストのみを用い、底質を含まない条件にて電位操作試験を実施した結果、電位操作はシストの発芽に影響を及ぼさなかった。このことは、シストが直接的に電位を感知していないこと、また、海水中の酸化還元物質がシストの発芽応答へ影響をおよぼさないことを示唆するものである。底質中に含まれる酸化還元物質および電子伝達物質が発芽応答への影響をおよぼす可能性が残されていることから今後検証する予定である。一方、シストの発芽自体には影響が認められなかったものの、発芽後の一部の栄養細胞の行動に異常が確認された。
    電位操作がプランクトンに与える影響の作用機序の解明に向け、本年度はまずシストの形成から発芽にいたるまでの代謝物をメタボローム解析を用いて同定した。その結果、栄養細胞とシストでは脂肪酸含有量が変化すること、また、シストの形成および保存温度により糖質の含有量が異なる事等が明らかとなり、発芽機序解明に向けシストの代謝物に関する基盤となる情報を得た。

    researchmap

  • 底質汚染の視点で考える環境調和型養殖システムの構築‐養殖環境の抜本的解決のために

    Grant number：20H03069  2020.4 - 2024.3

    日本学術振興会  科学研究費助成事業  基盤研究(B)

    伊藤 克敏, 中村 龍平, 羽野 健志

    　 More details

    Grant amount：\17550000 （ Direct Cost: \13500000 、 Indirect Cost：\4050000 ）

    酸揮発性硫化物量（AVS）を基準とした3段階（AVS：試験区1：0.04 mg/g、試験区２：0.24 mg/g、試験区３：1.21 mg/g）の底質を用いてマダイの底質曝露試験を実施した。なお試験方法は令和2年度に実施したクルマエビ底質毒性試験を参考にした。その結果、試験区３では13日後に、試験区2では20日後に7匹全て死亡した。試験区１は、20日後に7匹中1匹死亡したが、残りの6匹は28日間生残した。この結果から、底質汚染はマダイの生残に重大な影響を及ぼすことが改めて立証された。また、底質AVSは、マダイを収容している全ての試験区に比べ、マダイを収容していないコントロール区で有意に高い値を示した。この結果は、昨年度実施したクルマエビの結果と同様であった。電位操作による毒性試験を実施するため、電位を-300ｍV、＋300ｍVに設定し、マダイを飼育した。その結果、電位操作の影響は認められなかった。なお、得られた成果は、2021年秋の水産学会で発表した（コロナ感染拡大のため要旨のみ）。

    researchmap

  • Development of 3-d block oxygen evolution catalysts based on new activity prediction model

    Grant number：18H02070  2018.4 - 2021.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    Nakamura Ryuhei

    　 More details

    Grant amount：\17290000 （ Direct Cost: \13300000 、 Indirect Cost：\3990000 ）

    As a method to introduce structural distortion into Mn oxides, we have studied gamma-type MnO2, which has a microtwinning structure and allows precise control of structural distortion. As a result, it was confirmed that the disproportionation reaction of Mn3+ is suppressed with the introduction of structural distortion, and the overpotential of oxygen evolution is reduced. By optimizing the electrolysis conditions taking into account the potential dependence of the disproportionation reaction, we found that the MnO2 catalyst can stably electrolyze water even in a strong acid environment.

    researchmap

  • Reproduction of prebiotic metabolic pathways with deep-sea hydrothermal electricity

    Grant number：16K05625  2016.4 - 2019.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (C)

    YAMAMOTO Masahiro, NAKAMURA Ryuhei, KITADAI Norio

    　 More details

    Grant amount：\4550000 （ Direct Cost: \3500000 、 Indirect Cost：\1050000 ）

    In-situ electrochemical measurements were carried out on hydrothermal fields in deep-sea and shallow sea. Especially, successful in survey of in-situ electrochemical measurement in alkaline hydrothermal vents was significant to consider about chemical evolution of metabolic pathways. Survey of deep-sea hydrothermal field also sufficiently achieved and understanding was deepened about relationship between electric field, electricity discharge, and minerals. Experiments for reproduction of metabolic pathways in electrochemical cells were carried out in laboratory. The results revealed that catalytic efficiencies of chemical reactions were influenced by types of sulfide minerals and exchange of minerals with electricity.

    researchmap

  • Development of electron transfer theory which sustain deep-sea biosphere dependent on chemical, thermal, and electrical energy conversion

    Grant number：16K14815  2016.4 - 2019.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Challenging Exploratory Research

    Nakamura Ryuhei

    　 More details

    Grant amount：\3640000 （ Direct Cost: \2800000 、 Indirect Cost：\840000 ）

    To understand the newly hypothesized deep-sea electro-ecosystems, we investigated how electrical current affects the physiology of marine benthos. We found that (1) benthos generates weak electrical current, (2) core metabolisms of benthos is affected by direction of electrical current flow, and also (3) behavior of benthos is also regulated by environmental redox potential. These findings demonstrate the importance of “electrical current” as a new parameter to understand the ecology of deep-sea electro-ecosystems.

    researchmap

  • Design of bio-inspired oxygen evolution catalysts based on multielectron transfer regulation

    Grant number：26288092  2014.4 - 2017.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (B)

    Ryuhei Nakamura

    　 More details

    Grant amount：\11180000 （ Direct Cost: \8600000 、 Indirect Cost：\2580000 ）

    Based on the new hypothesis that the difference in the stability of Mn3+ between biological and artificial Mn catalysts is the origin for the activity difference, we have attempted to design the efficient catalysts for water oxidation under neutral pH. It was demonstrated that the induction of coupled electron-proton transfer is effective strategy to stabilize Mn3+, leading to the large enhancement of the activity. It was also demonstrated that the exposure of metastable faces of and lowering the size of Mn catalysts stabilize Mn3+, thus enhancing the activity. Furthermore, by comparing the mechanisms of novel-metal catalysts, we have successfully generalize our concept of Mn3+, highlighting that the spin state regulation of intermediates is critical to generate next-generation O2 evolution catalysts with abundant 3d-block elements.

    researchmap

  • Proof of electrotrophic microbial community development and electric power production in deep-sea hydrothermal vents

    Grant number：24244091  2012.5 - 2015.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (A)

    TAKAI Ken, NAKAMURA Ryuhei, YAMAMOTO Masahiro

    　 More details

    Grant amount：\47190000 （ Direct Cost: \36300000 、 Indirect Cost：\10890000 ）

    In this project, enrichment of possible electrotrophic microbial communities has been tested under 600 mV redox potential in the laboratory. However, we have not successfully found biomass production of electrotrophic microbial community. Next, it has been conducted in natural deep-sea hydrothermal vent environments. In the Iheya North hydrothermal field, a fuel cell has been deployed for two weeks using platinum-coated titanium electrodes, deployed in a hydrothermal fluid and ambient seawater. During the deployment, generation of 600 mV redox potential has been achieved. After the recovery, dense biofilm has been identified on the surface of cathode. The efficient electron conductivity and the dense biofilm development both point to the possible enrichment and biomass production of microbial community significantly based on the electroautotrophy. This research project reveals the possible existence of electrotrophic microbial community in natural deep-sea hydrothermal environments.

    researchmap

  • Solar driven CO2 fixation using non-photosynthetic microbes and Fe ions as energy carrier

    Grant number：24655167  2012.4 - 2014.3

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Challenging Exploratory Research

    NAKAMURA Ryuhei

    　 More details

    Grant amount：\4030000 （ Direct Cost: \3100000 、 Indirect Cost：\930000 ）

    We exploited the ability of the deep-sea Fe-oxidizing bacteria, Mariprofundus ferrooxidans, to elevate the intracellular electrons into a higher energetic state as a built-in voltage multiplayer circuit. In-vivo electrochemical analysis of CO2 fixation processes revealed that the cells multiplies the voltage to 0.95 V, which enables to initiate the electrochemical CO2 reduction coupled with water oxidation at an external voltage of 0.19 V. The value of 0.19 V is one order of magnitude lower than the thermodynamic limit for producing organic compounds via CO2 reduction coupled with water oxidation. Thus, the integrated bioelectrochemical process could provide a way to utilize extremely low-voltage-electricity supplied by several sources such as hydro, solar, wind, geothermal, and others for the electrochemical conversion of CO2 to organic chemicals.

    researchmap

  • Pioneer the Physical Chemistry of Biological Electron Transfer based on Bacterial Extracellular Electron Transport

    Grant number：24000010  2012 - 2016

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Specially Promoted Research

    HASHIMOTO Kazuhito, NAKAMURA Ryuhei, NAKANISHI Shuji, ISHIHARA Kazuhiko, TAJIMA Keisuke, OKAMOTO Akihiro, KAMIYA Kazuhide

    　 More details

    Grant amount：\512850000 （ Direct Cost: \394500000 、 Indirect Cost：\118350000 ）

    The molecular mechanism of extracellular electron transfer (EET) was clarified through the direct observation of the dynamics, leading to the development of the methodologies for reversible regulation and collective activation of cellular metabolisms. It was also revealed that microorganisms with EET ability are widely distributed in natural environments. Furthermore, we successfully applied the concept of the EET to mammalian cells that do not possess EET ability by developing cytocompatible electron mediators. Based on the systematic understandings of the EET obtained through the present study, novel methodologies and perspectives were provided to various fields, including measurement/regulation of circadian clocks and cancer cells, and proposal of new ecosystem supported by electricity.

    researchmap

  • Roles of semiconductive minerals in metabolic activity of microorganisms

    Grant number：21750186  2009 - 2010

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Young Scientists (B)

    NAKAMURA Ryuhei

    　 More details

    Grant amount：\4680000 （ Direct Cost: \3600000 、 Indirect Cost：\1080000 ）

    To examine the roles of semiconductive minerals in the respiratory activity of microorganisms, we cultured the dissimilatory metal-reducing bacterium, Shewanella loihica PV-4, in an electrochemical cell and examined the influence of cell surface-associated Fe-oxide nanocolloids on the extracellular electron-transfer efficiency. The respiratory current was greatly improved (over 50 fold) when α-Fe_2O_3 were supplemented into the cell cultures. In vivo electrochemical studies have revealed that electrons injected from the cells to the conduction band of colloids to move long distances from cell surfaces without the use or requirement of soluble electron shuttles. This finding suggests the microbial ability to exploit semiconductive minerals for transporting and sharing electrons in anaerobic environments.

    researchmap

  • Study on risk assessment of TiO_2 nano particles and environmental improvement utilizing TiO_2 photocatalysis

    Grant number：19201015  2007 - 2010

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Scientific Research (A)

    HASHIMOTO Kazuhito, MIYAMA Yoko

    　 More details

    Grant amount：\46800000 （ Direct Cost: \36000000 、 Indirect Cost：\10800000 ）

    The exposure of titanium dioxide(TiO_2) nanosized particle from TiO_2 photocatalytic materials was less than 1/50^th of permissible dose in NIOSH, suggesting that the risk of nano-particle exposure from the TiO_2 materials is very low level. The photocatalytic materials for soil and water purification were prepared respectively, and it was confirmed that polluted soil and agricultural wastewater were cleaned up by each system with the photocatalytic material in a level of practical use.

    researchmap

  • Visible-Light Sensitive Photocatalysts Based on the New Operation Principle

    Grant number：19750159  2007 - 2008

    Japan Society for the Promotion of Science  Grants-in-Aid for Scientific Research  Grant-in-Aid for Young Scientists (B)

    NAKAMURA Ryuhei

    　 More details

    Grant amount：\3780000 （ Direct Cost: \3300000 、 Indirect Cost：\480000 ）

    researchmap

  • 半導体結晶の表面構造規制と光エネルギー変換機能の向上を目指した表面反応機構の研究

    Grant number：06J04048  2006 - 2007

    日本学術振興会  科学研究費助成事業  特別研究員奨励費

    中村 龍平

    　 More details

    Grant amount：\1200000 （ Direct Cost: \1200000 ）

    金属酸化物半導体は、光エネルギー変換に適した光触媒として、多くの研究がなされている。本研究では、「表面反応中間体の分光学的in situ直接観察」および「金属酸化物表面構造の原子レベル制御」の2点から研究方法の開拓を進め、これを通じて反応機構の解明を行ってきた。特に光機能界面として最も重要であるTiO_2/水溶液界面における水の光酸化・酸素発生反応に焦点をあて、この反応の機構を原子・分子のレベルで解明を行った。また、新規可視光応答型の光触媒として光誘起MMCTで駆動するヘテロ金属分子光材料の開発も行ってきた。以下に主な結果を述べる。
    (1)新しい表面処理法であるHF浸漬-高温焼成法を用いることで、原子レベルで平坦でかつ安定なTiO_2ルチル表面を作製することに成功した。その結果、表面バンドエネルギーや価電子帯正孔の反応性がTiO_2の表面原子構造配列に依存することを世界で初めて明らかにした。さらに、in situ PL法を用いて、水の光酸化反応の前駆体である表面捕捉正孔を捉え、この原子レベルでの構造やエネルギーの面依存性を明らかにした。
    (2)金属酸化物上での結果を踏まえて、窒素含有・金属酸化物上における可視光照射下での光酸素発生反応の機構の検討を行った。TaON微粒子粉末を用いて薄膜光電極を作成し、種々の還元剤添加による光電流作用スペクトルの変化の詳細な検討から、可視光照射下での水の酸化反応は"電子移動機構"で進行するのではなく、"水分子の求核攻撃機構"によって進行することを明確に示した。
    (3)さらに、多電子移動触媒であるIrO_2、および光合成のPSII中心のモデル触媒としてMn二核錯体の合成を行い、水の酸化反応が上と同様に"水分子の求核攻撃機構"で反応が進むという重要な結果を明らかにしつつある。
    (4)ヘテロ金属からなる無機分子光材料の開発を行った。ヘテロ金属錯体の光誘起MMCTによって、可視光照射下で光触媒反応を駆動させることに成功した

    researchmap

  • 金属酸化物半導体の光エネルギー変換機能の向上をめざした表面光反応機構の解明

    Grant number：04J08141  2004 - 2005

    日本学術振興会  科学研究費助成事業  特別研究員奨励費

    中村 龍平

    　 More details

    Grant amount：\1900000 （ Direct Cost: \1900000 ）

    二酸化チタンに代表される金属酸化物半導体は、光エネルギー変換に適した光触媒として、多くの研究がなされている。真に高性能な光反応系を実現するためには、金属酸化物表面で起こる光反応の機構を明らかにし、それを踏まえた材料開発を行う必要がある。以上の観点から、本研究では「表面反応中間体の分光学的in situ直接観察」および「金属酸化物表面構造の原子レベル制御」の2点から研究方法の開拓を進め、これを通じて反応機構の解明を行ってきた。特に光機能界面として最も重要であるTiO_2/水溶液界面における水の光酸化・酸素発生反応に焦点をあて、この反応の機構を原子・分子のレベルで解明を行った。以下に主な結果を述べる。
    (1)新しい表面処理法であるHF浸漬-高温焼成法を用いることで、原子レベルで平坦でかつ安定なTiO_2ルチル表面を作製することに成功した。その結果、表面バンドエネルギーや価電子帯正孔の反応性がTiO_2の表面原子構造配列に依存することを世界で初めて明らかにした。さらに、in situ PL法を用いて、水の光酸化反応の前駆体である表面捕捉正孔を捉え、この原子レベルでの構造やエネルギーの面依存性を明らかにした。
    (2)金属酸化物上での結果を踏まえて、窒素含有・金属酸化物上における可視光照射下での光酸素発生反応の機構の検討を行った。TaON微粒子粉末を用いて薄膜光電極を作成し、種々の還元剤添加による光電流作用スペクトルの変化の詳細な検討から、可視光照射下での水の酸化反応は"電子移動機構"で進行するのではなく、"水分子の求核攻撃機構"によって進行することを明確に示した。
    (3)さらに、多電子移動触媒であるIrO_2、および光合成のPSII中心のモデル触媒としてMn二核錯体の合成を行い、水の酸化反応が上と同様に"水分子の求核攻撃機構"で反応が進むという重要な結果を明らかにしつつある。

    researchmap

  • ‐

    その他の研究制度 

    　 More details

    Grant type：Competitive

    researchmap

▼display all