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碳载Pt和PtRu催化剂的甲醇电氧化比较

Comparison of Methanol Electrooxidation on Carbon Supported Pt and PtRu Catalysts

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【Author】 Peng Cheng Cheng Xuan Zhang Ying Chen Ling Fan Qing-Bai(Department of Materials Science and Engineering, Department of Chemistry, State Key Laboratory for Physical Chemistry ofSolid Surfaces, Xiamen University, Xiamen 361005, China; Gas Technology Institute, Des Plaines, IL 60018, USA)

【机构】厦门大学材料科学与工程系；厦门大学化学系固体表面物理化学国家重点实验室；美国气体技术研究院厦门 361005；伊利诺伊斯 IL 60018；

【摘要】利用电化学方法对商用Pt/C和PtRu/C催化剂在酸性介质中的甲醇电氧化进行了比较研究。动电位和恒电位氧化实验结果皆表明PtRu/C比Pt/C对甲醇电催化活性高,PtRu合金的形成不仅改变了催化剂表面对氢的吸附性质.而且使氧化物还原峰电位向阴极方向移动.Ru与甲醇的相互作用为温度活化过程.需要较高的温度。更多还原

【Abstract】 The methanol electrooxidation behaviors on commercial carbon supported Pt and PtRu catalysts in acid solution were compared by carrying out electrochemical studies. The potentiodynamic and potentiostatic experimental results showed that the PtRu/C has a higher electrocatalytic activity for the electrocatalytic oxidation of methanol than the Pt/C. Alloy formation of Ru with Pt not only modified the characteristics of H2 adsorption on the surface of catalyst but also shifted cathodically the reduction peaks of metal oxide on the cathodic sweep with respect to Pt/C. The interaction of CH3OH with Ru is a temperature-activated process requiring elevated temperature.更多还原

【关键词】直接甲醇燃料电池；甲醇电氧化；电催化活性；氢吸附；催化剂；
【Key words】 Direct methanol fuel cell； Methanol electrooxidation； Electrocatalytic activity； Hydrogen adsorption； Catalyst；

【基金】国家自然科学基金(20073036)资助项目~~

【文献出处】物理化学学报 ,Acta Physico-chimica Sinica , 编辑部邮箱 ,2004年04期

【分类号】O643.3
【被引频次】18
【下载频次】317

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