Fabrication of novel electronic-catalysts by using MIM tunnel junction

利用 MIM 隧道结制造新型电子催化剂

• 批准号: 22656138
• 负责人: WADAYAMA Toshimasa
• 金额: $ 2.3万
• 依托单位: Tohoku University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Challenging Exploratory Research
• 财政年份: 2010
• 资助国家: 日本
• 起止时间: 2010 至 2011
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-22656138/
• 关键词: トンネル接合; 電子触媒; ホットエレクトロン

Precise and tunable control in electronic states of the metal surface should be directly linked to a novel catalytic reaction. Metal-insulator-metal (MIM)tunnel junction, which generates monochromatic hot-electrons under bias-voltage, would be one of the suitable devices for the hot-electron generation. The aim of this study is to clarify the tunnel junction surface works as a promoter of the surface reaction of the adsorbed molecules. We investigate the hot-electron-induced surface reaction of p-and o-nitrobenzoic acid (PNBA, ONBA)on the Ag(Au)top electrode of the Ag(Au)/AlOx/Al tunnel junction by using surface enhanced Raman scattering (SERS). The results show that the hot-electron generated under positive-bias voltage can induce reductive coupling reaction of the adsorbed molecules to generate azodibenzoate at the top electrode surface through surface plasmon polariton (SPP)resonance.

金属表面电子态的精确和可调控制应该与新型催化反应直接相关。金属-绝缘体-金属（MIM）隧道结在偏置电压下产生单色热电子，将是产生热电子的合适器件之一。本研究的目的是阐明隧道结表面作为吸附分子表面反应的促进剂的作用。我们利用表面增强拉曼散射研究了对硝基苯甲酸和邻硝基苯甲酸（PNBA、ONBA）在 Ag(Au)/AlOx/Al 隧道结的 Ag(Au) 顶部电极上的热电子诱导表面反应。表面增强拉曼光谱）。结果表明，正偏压下产生的热电子可以通过表面等离子体激元（SPP）共振，在顶部电极表面诱导吸附分子的还原耦合反应，生成偶氮二苯甲酸酯。