2022 Fiscal Year Final Research Report
Development of highly efficient and selective photocatalyst systems for CO2 reduction using H2O as an electron donor
| Project Area | Creation of novel light energy conversion system through elucidation of the molecular mechanism of photosynthesis and its artificial design in terms of time and space |
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| Project/Area Number |
17H06440
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| Research Category |
Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area)
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| Allocation Type | Single-year Grants |
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| Review Section |
Complex systems
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| Research Institution | Tokyo University of Science |
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Principal Investigator |
Kudo Akihiko 東京理科大学, 理学部第一部応用化学科, 教授 (60221222)
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| Co-Investigator(Kenkyū-buntansha) |
石谷 治 東京工業大学, 理学院, 教授 (50272282)
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| Project Period (FY) |
2017-06-30 – 2022-03-31
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| Keywords | 人工光合成 / 二酸化炭素還元 / 半導体光触媒 / 分子光触媒 / 水 / メタン / Z スキーム / 電子 |
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| Outline of Final Research Achievements |
Ag/SrTiO3:Rh-BiVO4 and (CuGa)1-xZn2xS2-RGO-CoOx/BiVO4 were developed as Z scheme photocatalysts working under VIS for CO2 reduction using water as an electron donor. Rh-Ru, Pd-Ru, Pt-Ru cocatalysts were found for CO2 reduction to form CH4 efficiently using NaTaO3:Sr of a wide band gap photocatalyst.
A three-metal nuclear complex photocatalyst consisting of Ru(II), Os(II), and Re(I) was successfully synthesized and showed 4300 of a turnover number for CO2 reduction. A mechanism of photocatalytic CO2 reduction using RuC2Re molecular photocatalyst was clarified.
[Ru(dpbpy)] or [Co-dmbpy]-employed (CuGa)1-xZn2xS2+BiVO4 Z scheme photocatalyst and Ru(II)－Ru(II) supermolecule(RuP4Ru)-modified Ag/TaON photocatalyst were developed as a semiconductor-molecular hybrid photocatalyst for CO2 reduction.
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| Free Research Field |
触媒化学，光化学，無機材料化学
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| Academic Significance and Societal Importance of the Research Achievements |
光触媒を用いた二酸化炭素において，可視光を効率良く使えない，効率が低い，水を電子源として使えないという３つの大きな課題点があった．これらの課題点に対して，水を電子源とした高選択的な二酸化炭素還元に活性を示す半導体・分子光触媒を基盤とした可視光応答性Zスキーム光触媒の開発に成功したことは，光触媒，二酸化炭素の資源化という人工光合成の研究分野において，学術的に大いに意義がある．これらの経過はまだ基礎研究レベルであるが，将来人工光合成の社会実装において，基礎となる技術になると期待される。
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