Sakai, Ken - Kyushu University - Department of Chemistry

个人简介

Study Records 1987 BS from Department of Chemistry, School of Science and Engineering, Waseda University 1989 Degree of Master from Department of Chemistry, Graduate School of Science and Engineering, Waseda University. 1993 PhD in Science, from Department of Chemistry, Graduate School of Science and Engineering, Waseda Univerity (Supervisor: Prof. Kazuko Matsumoto) Job Positions 1991 Research Associate, Department of Industrial Chemistry, Faculty of Engineering, Seikei University 1999 (April) Assistant Professor, Department of Applied Chemistry, Faculty of Science, Tokyo University of Science (or Science University of Tokyo; the English name was changed several years ago.) 2003(April) Associate Professor, Department of Applied Chemistry, Faculty of Science, Tokyo University of Science 2004(August)-Present Professor of Chemistry, Department of Chemistry, Faculty of Science, Kyushu University 2011.04-Present Professor, Center for Molecular Systems (CMS), Kyushu University 2012.01-Present Principal Investigator, International Institute for Carbon Neutral Energy Research (WPI-I2CNER), Kyushu University 2014.10-Present Member of Science Council of Japan

研究领域

Decomposition of water (H2O) into hydrogen gas (H2) and oxygen gas (O2) results in storage of energy by 238 kJ/mol. The reverse reaction, that is, the combustion of hydrogen gas (H2) with oxygen gas (O2) , leads to the output of either heat or electricity. One of the most important applications of this promising new energy is its use in the fuel cells driving the cars. Moreover, the combustion of hydrogen energy dose not lead to the emission of carbon dioxide (CO2) which is especially notorious as a greenhouse gas causing the global heating on the earth. Therefore, hydrogen energy is now considered as a clean energy to be used in our future energy resource. In this context, it is considerably important for us chemists to develop highly efficient catalysts to lower the activation barriers for both the oxidation and reduction of water into oxygen and hydrogen gases, respectively. It must be also noted that, unfortunately, the human beings have been unsuccessful thus far in developing the catalysts that are applicable to the actual use. In order to solve the above-mentioned energy issues, a large variety of multinuclear metal complexes have been developed and tested in our group (multinuclear metal complexes denote molecular compounds involving two or more metal ions). As an extended project, the solar energy conversion based on decomposition of water into hydrogen and oxygen gases has also been investigated for a long time in our group. After KS has moved to Kyushu University, the group started to investigate the catalytic functions of particular multinuclear metal complexes in electrochemical oxygen reduction or alcohol oxidation in view of their applications to the fuel cells. In each system, metal complexes are required to mediate a multi-electron process in the catalysis. In other words, multinuclear metal complexes are considered as promising candidates of catalysts for such multi-electron one-step processes.

近期论文

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"An Earth-abundant System for Light-driven CO2 Reduction to CO Using a Pyridinophane Iron Catalyst" Yuto Sakaguchi, Arnau Call, Mihaela Cibian, Kosei Yamauchi and Ken Sakai Chem. Commun., 2019, 55, 8552-8555. "Room-Temperature Benzylic Alkylation of Benzylic Carbonates: Improvement of Palladium Catalyst and Mechanistic Study"Ryoichi Kuwano, Masashi Yokogi, Ken Sakai, Shigeyuki Masaoka, Takashi Miura, and Sungyong Won Org. Process Res. Dev., 2019, Accepted. "A Molecular Cobalt Hydrogen Evolution Catalyst Showing High Activity and Outstanding Tolerance to CO and O2"Jia-Wei Wang, Kosei Yamauchi, Hai-Hua Huang, Jia-Kai Sun, Zhi-Mei Luo, Di-Chang Zhong, Tong-Bu Lu, and Ken Sakai Angew. Chem. Int. Ed., 2019, 58, 10923-10927. "Mechanisms of Water Oxidation using Ruthenium, Cobalt, Copper, and Iron Molecular Catalysts"Alexander Rene Parent, Takashi Nakazono, Yuta Tsubonouchi, Natsuki Taira and Ken Sakai Adv. Inorg. Chem., 2019, 74, 197-240. "Highly Efficient and Selective Photocatalytic CO2 Reduction to CO in Water by a Cobalt Porphyrin Molecular Catalyst"Arnau Call, Mihaela Cibian, Keiya Yamamoto, Takashi Nakazono, Kosei Yamauchi, and Ken Sakai ACS Catal., 2019, 9, 4867-4874. "Ligand-based PCET Reduction in a Heteroleptic Ni(bpy)(dithiolene) Electrocatalyst Giving Rise to Higher Metal Basicity Required for Hydrogen Evolution"Keita Koshiba, Kosei Yamauchi, and Ken Sakai Chem ElectroChem, 2019, 6, 2273-2281. "A New Class of Molecular-Based Photoelectrochemical Cell for Solar Hydrogen Production Consisting of Two Mesoporous TiO2 Electrodes"Kohei Morita, Ken Sakai, and Hironobu Ozawa ACS Appl. Energy Mater., 2019, 2, 987-992. "Consecutive Ligand-based PCET Processes Affording a Doubly Reduced Nickel Pyrazinedithiolate which Transforms into a Metal Hydride Required to Evolve H2"Keita Koshiba, Kosei Yamauchi, and Ken Sakai Dalton Trans., 2019, 48, 635-640. "A family of molecular nickel hydrogen evolution catalysts providing tunable overpotentials using ligand-centered proton-coupled electron transfer paths"Yutaro Aimoto, Keita Koshiba, Kosei Yamauchi and Ken Sakai Chem. Commun., 2018, 54, 12820-12823. "Photocatalytic H2 Evolution Using a Ru Chromophore Tethered to Six Viologen Acceptors"Keiya Yamamoto, Arnau Call and Ken Sakai Chem. Eur. J., 2018, 24, 16620-16629. (Selected as a Very Important Paper.) "Synthesis and Complete Structure Determination of a Sperm-Activating and -Attracting Factor Isolated from the Ascidian Ascidia sydneiensis"Tomohiro Watanabe, Hajime Shibata, Makoto Ebine, Hiroshi Tsuchikawa, Nobuaki Matsumori, Michio Murata, Manabu Yoshida, Masaaki Morisawa, Shu Lin, Kosei Yamauchi, Ken Sakai, and Tohru Oishi J. Nat. Prod., 2018, 81, 985-997. "Platinum(II)-glutamic acid dendrimer conjugates: Synthesis, characterization, DFT calculation, conformational analysis and catalytic properties"Anas Lataifeh, Heinz-Bernhard Kraatz, Firas F.Awwadi, Mohammed A.Zaitoun and Ken Sakai Inorg. Chim. Acta, 2018, 473, 245-254. "Near-Infrared-Light-Driven Hydrogen Evolution from Water using a Polypyridyl Triruthenium Photosensitizer"Yutaro Tsuji, Keiya Yamamoto, Kosei Yamauchi, and Ken Sakai Angew. Chem. Int. Ed., 2018, 57, 208-212. (Selected as a Cover Picture.) "A Platinum Porphyrin Modified TiO2 Electrode for Photoelectrochemical Hydrogen Production from Neutral Water Driven by the Conduction Band Edge Potential of TiO2"Kohei Morita, Kohei Takijiri, Ken Sakai, and Hironobu Ozawa Dalton Trans., 2017, 46, 15181-15185. "Photochemical H2 Evolution Catalyzed by Porphyrin-based Cubic Cages Singly and Doubly Encapsulating PtCl2(4,4’-dimethyl-2,2’-bipyridine)"Shota Tanaka, Takashi Nakazono, Kosei Yamauchi, and Ken Sakai Chem. Lett., 2017, 46, 1573-1575. (Selected as a Cover Picture and an Editor's Choice.) Open Access! "[Pt(SCN)4]2--Based Coordination Polymers and Supramolecular Squares: Intermolecular Pt···H-C Interactions Probed by Luminescence Spectroscopy at Variable Pressure"Yan Suffren, Masayuki Kobayashi, Jeffrey S. Ovens, Alexandre Rodrigue-Witchel, Caroline Genre, Ken Sakai, Christian Reber, and Daniel B. Leznoff Eur. J. Inorg. Chem., 2017, 2865-2875. "Highly Stable Chemisorption of Dyes with Pyridyl Anchors over TiO2: Application in Dye-Sensitized Photoelectrochemical Water Reduction in Aqueous Media"Kohei Takijiri, Kohei Morita, Takashi Nakazono, Ken Sakai and Hironobu Ozawa Chem. Commun., 2017, 53, 3042-3045. "A Nickel Dithiolate Water Reduction Catalyst Providing Ligand-based Proton-coupled Electron Transfer Pathways"Keita Koshiba, Kosei Yamauchi, and Ken Sakai Angew. Chem. Int. Ed., 2017, 56, 4247-4251. "Synthesis and Characterization of a RuPt-based Photo-Hydrogen-Evolving Molecular Device Tethered to a Single Viologen Acceptor"Masayuki Miyaji, Kyoji Kitamoto, Hironobu Ozawa, and Ken Sakai Eur. J. Inorg. Chem., 2017, 9, 1237-1244.