2020 Fiscal Year Final Research Report
Operando Spectroscopy Study on the Electrochemical Interfaces
Project/Area Number |
19K15360
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Research Category |
Grant-in-Aid for Early-Career Scientists
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Allocation Type | Multi-year Fund |
Review Section |
Basic Section 27030:Catalyst and resource chemical process-related
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Research Institution | Yamaguchi University |
Principal Investigator |
Katayama Yu 山口大学, 大学院創成科学研究科, 助教 (70819284)
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Project Period (FY) |
2019-04-01 – 2021-03-31
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Keywords | オペランド分光法 / 分子表面修飾 / アルコール酸化反応 |
Outline of Final Research Achievements |
We explored the reaction mechanisms on surface-modified Pt in the alkaline environment by tracking the reaction intermediates using operando infrared spectroscopy. We selected sulfur-organic copolymer, synthesized from S8 and organic molecule, as a surface modifier. Cyclic voltammogram and X-ray photoelectron spectroscopy confirm the successful surface modification of the Pt surface. The alcohol oxidation activity of surface-modified Pt was increased compared to the pristine Pt electrode. The degree of activity enhancement became more substantial with the increase in alkyl chain length of alcohol fuels (methanol < propanol < 1-butanol), suggesting the hydrophobicity and/or steric hindrance of the surface modifier play a key role in facilitating the oxidation reaction. The surface modification can be an effective strategy to tune the energetics of crucial reaction intermediates, leading to further improvements in electrocatalytic activity for the various electrochemical reactions.
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Free Research Field |
電気化学
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Academic Significance and Societal Importance of the Research Achievements |
近年の環境問題の深刻化や化石資源の枯渇に伴い、経済発展と自然環境保全が両立した「持続可能な社会」の実現が求められる。その鍵となるのが、(電極)触媒反応の特性向上である。本研究では、実際に反応が進行する触媒の最表面の特性をピンポイントで制御し、最適化する手法の確立を試みた。新たに開発した安価な分子を、触媒表面に20%程度修飾するだけで有意な活性向上が見られた。本手法であれば、既存の様々な材料に適用でき、その特性を向上できる。本成果と既存技術との相乗効果により、エネルギー効率に優れた触媒の開発が期待できる。
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