2023 Fiscal Year Final Research Report
Study of reaction mechanism based on evaluation of electron transfer under photocatalytic reaction
| Project/Area Number |
21K14722
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 36020:Energy-related chemistry
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| Research Institution | Osaka Metropolitan University (2022-2023)
Osaka City University (2021) |
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Principal Investigator |
Yamamoto Muneaki 大阪公立大学, 人工光合成研究センター, 特任助教 (50823712)
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| Project Period (FY) |
2021-04-01 – 2024-03-31
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| Keywords | 二酸化炭素還元 / in-situ分析 |
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| Outline of Final Research Achievements |
In this study, in-situ analysis of gallium oxide photocatalysts with silver nanoparticles as a co-catalyst was carried out in the presence of carbon dioxide and water vapor in order to construct a photocatalytic system to obtain useful carbon compounds.
The band gap excitation of the gallium oxide photocatalyst reduced the silver nanoparticles, whereas the localized surface plasmon resonance of the silver nanoparticles partially oxidized the surface of silver nanoparticles and the amount of adsorbed bicarbonate species as a reaction intermediate increased.
These results indicate that carbon dioxide reduction can be efficiently promoted by irradiating light at two different wavelengths.
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| Free Research Field |
触媒化学，エネルギー変換化学
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| Academic Significance and Societal Importance of the Research Achievements |
本研究は，持続可能な社会を構築するために，年々増加する二酸化炭素を炭素資源に変換する研究である．実用化に向けては，更なる反応活性の向上が必要であるが，そのためには反応のメカニズムを理解することが重要である．本研究で得られた，役割の異なる２種の波長の光照射により二酸化炭素変換反応を効率的に進行させることができるという知見は，本反応の効率化のみならず，他の反応系への応用も期待される．
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