2023 Fiscal Year Final Research Report
Development of Molecular Devices for Solar Fuels Generation based on Carbon Nitride Composites
| Project/Area Number |
21H01952
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Review Section |
Basic Section 34010:Inorganic/coordination chemistry-related
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| Research Institution | Kyushu University |
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Principal Investigator |
Sakai Ken 九州大学, 理学研究院, 教授 (30235105)
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| Co-Investigator(Kenkyū-buntansha) |
山内 幸正 九州大学, 理学研究院, 助教 (50631769)
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Keywords | 人工光合成 / カーボンナイトライド / ポリオキソメタレート / 酸素発生反応 / 二酸化炭素還元反応 / 光触媒 / 反応機構解析 / DFT計算 |
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| Outline of Final Research Achievements |
We have developed molecular catalysts of oxygen evolution and CO2 reduction reactions under low overpotential conditions. In addition, we elucidated the reaction mechanisms in detail with the aim of realizing artificial photosynthetic systems. Next, these molecular catalysts were physisorbed over carbon nitride (C3N4), a metal-free semiconductor photocatalyst responsive to visible light. It was succeeded to construct and demonstrate hybrid photocatalysts which can drive these reactions with high efficiency in the presence of sacrificial reagents.
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| Free Research Field |
金属錯体化学
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| Academic Significance and Societal Importance of the Research Achievements |
炭素と窒素から構成される有機半導体カーボンナイトライド（C3N4）は、可視光を吸収し水の酸化および二酸化炭素（CO2）還元の両反応を駆動可能なバンド構造を有する。本研究では、高活性な分子性酸素発生触媒（WOC）を開発し、C3N4光触媒への修飾を行った。光触媒性能試験の結果、犠牲試薬存在下で、分子性WOC修飾C3N4光触媒の中で最も高い触媒回転数／頻度が示された。CO2還元触媒修飾C3N4光触媒の構築にも成功し、水を電子源とする人工光合成系実現への道筋をつけた。
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