Characterization of Fuel Cell Catalysts by Cyclic Voltammetry and Rotated Disk Voltammetry

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题名:	Characterization of Fuel Cell Catalysts by Cyclic Voltammetry and Rotated Disk Voltammetry
其它题名:	以循環伏安法和旋轉盤伏安法特性分析燃料電池用電極觸媒
作者:	林仁斌范姜維亮李鴻達
贡献者:	工學院
关键词:	電觸媒旋轉電極氫氣氧化反應 Nafion 燃料電池 electrocatalyst rotating disk electrode hydrogen oxidation Nafion fuel cells
日期:	2010-01-01
上传时间:	2012-03-21 12:49:19 (UTC+8)
摘要:	本研究以循環伏安法及旋轉盤伏安法特性分析Pt/C觸媒之電化學特性及其對氫氣氣化的催化活性。應用修正的Koutecky-Levich方程式，可求出反應動力學參數。氫氣氣化電流因Nafion膜的存在而減少。當觸媒層厚度小於10μg Pt cm^(-2)及Nafion膜厚度小於0.2μm時，氫氣的質傳阻力可以忽略。根據Pt/C觸媒的真實面積(110平方公尺g^(-1)Pt)，所求得Pt/C觸媒的交換電流密度為0.75mAcm^(-2)。本研究之結果有助於使用Pt/C觸媒的燃料電池的電極之設計。 The electrochemical behavior of the Pt/C catalyst and its electrocatalytic activity toward hydrogen oxidation was characterized by cyclic voltammetry and rotated disk voltammetry. The modified Koutecky-Levich equation was used to determine the kinetic parameters. The current density was reduced by the presence of Nafion coating. By reducing the thickness of both the catalyst layer (≦10 μg Pt cm^(-2)) and the Nafion film (≦0.2 μm), the H2 mass-transport resistances can be neglected. The exchange current density based on the real electroactive surface area (110 m^2g^(-1) Pt) of the Pt/C catalyst was determined to be about 0.75 mA cm^(-2). The results of this study are useful for designing the electrodes for fuel cells using Pt/C catalyst.
關聯:	華岡工程學報 25期 p.107 -116
显示于类别:	[College of Engineering] Chinese Culture University Hwa Kang Journal of Engineering

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