物理化学学报 >> 2004, Vol. 20 >> Issue (04): 436-439.doi: 10.3866/PKU.WHXB20040423

研究简报 上一篇    下一篇

碳载Pt和PtRu催化剂的甲醇电氧化比较

彭程;程璇;张颖;陈羚;范钦柏   

  1. 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, 厦门 361005;美国气体技术研究院,伊利诺伊斯 IL 60018
  • 收稿日期:2003-08-26 修回日期:2003-12-08 发布日期:2004-04-15
  • 通讯作者: 程璇 E-mail:xcheng@xmu.edu.cn

Comparison of Methanol Electrooxidation on Carbon Supported Pt and PtRu Catalysts

Peng Cheng;Cheng Xuan;Zhang Ying;Chen Ling;Fan Qing-Bai   

  1. Department of Materials Science and Engineering,Department of Chemistry,State Key Laboratory for Physical Chemistry of Solid Surfaces, Xiamen University, Xiamen 361005,China;Gas Technology Institute, Des Plaines, IL 60018,USA
  • Received:2003-08-26 Revised:2003-12-08 Published:2004-04-15
  • Contact: Cheng Xuan E-mail:xcheng@xmu.edu.cn

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.

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

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.

Key words: Direct methanol fuel cell, Methanol electrooxidation,  Electrocatalytic activity, Hydrogen adsorption, Catalyst