Development of metal complex-semiconductor hybrid photocatalyst by photoelectrochemical approach

2018 Fiscal Year Final Research Report

• Project/Area Number: 16K21031
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Energy-related chemistry; Catalyst/Resource chemical process
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: Kumagai Hiromu 東京工業大学, 理学院, 特任助教 (80761311)
• Project Period (FY): 2016-04-01 – 2019-03-31
• Keywords: 光触媒 / 光電気化学 / 金属錯体－半導体ハイブリッド / 二酸化炭素還元

Outline of Final Research Achievements

Hybrid photoelectrochemical systems consisting of metal complex and semiconductor photocatalysts have been developed as a motif of hybrid photocatalyst. The hybrid photocathodes immobilized with metal complexes for CO2 reduction and semiconductor photoanodes for water oxidation were individually developed. The activities and the photoelectrochemical properties of these photoelectrodes were analyzed to obtain knowledge for developing a system that can drive CO2 reduction using water as an electron donor. CO2 reaction with water oxidation was demonstrated by connecting with the photocathode and the photoanode, or combining these materials on a single electrode.

Free Research Field

エネルギー関連化学

Academic Significance and Societal Importance of the Research Achievements

金属錯体－半導体ハイブリッド光触媒は、二種類の異なる光触媒材料が可視光を吸収することで、人工光合成型の二酸化炭素の資源化（還元）反応を効率的に進行させうる系である。本研究では、ハイブリッド光触媒を要素ごとに電極として分割して開発・解析することで、これまでに実現できていなかった光のエネルギーのみで二酸化炭素と水から持続的な二酸化炭素還元を進行させるハイブリッド光触媒系の設計指針を得て、それを実証した。