成果報告書詳細
管理番号100013794
タイトル*平成20年度中間年報 燃料電池先端科学研究事業2
公開日2009/4/24
報告書年度2008 - 2008
委託先名国立大学法人お茶の水女子大学
プロジェクト番号P08001
部署名燃料電池・水素技術開発部
和文要約以下本編抜粋:触媒である白金量低減化を図るため、異種金属単結晶基板上に白金の超薄膜を電気化学的に形成させ、触媒活性と白金原子配列との関係を定量的に解析し、触媒メカニズムを原子レベルで明らかにする事を目的としている。
英文要約Title : Fuel Cell Cutting-Edge Scientific Research Project (FY2008-2009) FY2008 Annual Report 1-1. Control of Electrode Surface for Reduction of Pt Catalysis In order to reduce an amount of Pt catalysis, electrochemically deposited Pt ultra-thin layers on Au single crystal electrodes were prepared and their catalytic activities for oxygen reduction reaction (ORR) were investigated. Although it was reported that the order of activity of low index faces of the Pt single crystal electrodes increased in the sequence Pt(100) < Pt(111) < Pt(110), the order of activity of Pt ultra-thin films electrodeposited on the low index faces of the Au single crystal electrodes increased in the sequence Pt/Au(111) < Pt/Au(110) < Pt/Au(100), which was same trend of the Au single crystal substrates. Also, in this year, electrochemical scanning tunneling microscope (ECSTM) and rotating ring disk electrode (RRDE) systems were introduced for preciously observation of the atomic arrangements on the electrode surfaces in situ and for quantitatively analysis of the electrochemical reactions, respectively. 1-2. Analysis of Dissolution Mechanisms of Pt Catalysis In order to quantitatively analyze the dissolution reaction of Pt catalysis, electrochemical quartz crystal microbalance (EQCM) system, which allows us to monitor mass change at a 0.1 ng order during electrochemical reaction, was introduced. Electrochemical cell, reference electrode, counter electrode, and so on, were improved and then stability of the system became higher.
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