高等学校化学学报 ›› 2004, Vol. 25 ›› Issue (5): 917.

• 研究论文 • 上一篇    下一篇

Sm3+对甲醇电化学氧化反应的助催化作用

杜秉忱1, 刘晶华1, 薛新忠1, 徐维林1, 邢巍1, 陆天虹2   

  1. 1. 中国科学院长春应用化学研究所, 长春 130022;
    2. 中国工程物理研究院, 绵阳 621900
  • 收稿日期:2003-04-02 出版日期:2004-05-24 发布日期:2004-05-24
  • 通讯作者: 邢 巍(1963年出生),男,博士,研究员,博士生导师,从事化学电源和金属表面电化学处理技术研究.E-mail:xingwei@ciac.jl.cn E-mail:xingwei@ciac.jl.cn
  • 基金资助:

    国家“八六三”计划项目(批准号:2003AA517062);国家“九七三”计划项目(批准号:G2000026408);吉林省自然科学基金(批准号:20000510)资助

Studies on Promoting Catalysis of Sm3+ Towards Oxidation of Methanol on the Pt Electrode

DU Bing-Chen1, LIU Jing-Hua1, XUE Xin-Zhong1, XU Wei-Lin1, XING Wei1, LU Tian-Hong2   

  1. 1. Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China;
    2. Chinese Academy of Physical Engineering, Mianyang 621900, China
  • Received:2003-04-02 Online:2004-05-24 Published:2004-05-24

摘要: 分别以相同面积的光滑Pt电极和吸附了Sm3+的铂电极作为工作电极,在酸性介质中采用循环伏安法对甲醇氧化进行测定.结果表明,吸附了Sm3+的Pt电极上产生了更大的氧化电流,表明Sm3+的加入对甲醇的电催化氧化起到了促进作用.这一研究结果在直接甲醇燃料电池(DMFC)阳极催化剂研制方面具有较大的应用潜力.

关键词: 甲醇, 电化学氧化, Sm3+, 助催化作用

Abstract: Electrocatalytic performance of Sm3+ adsorbed on the smooth surface of Pt electrode toward the oxidation of methanol has been studied. The experimental results show that Sm3+ has a high promoting catalysis for electrocatalytic oxidation of methanol in electrolyte. According to the positive experimental data(cyclic voltammograms) and the theoretical analysis, one coordination complex Pt-Sm3+-CH3OH may be formed and acted as a critical intermediate during the reaction of methanol oxidation. Some in-situ spectral characterizations are in the process to confirm the existence of the complex. The mechanism of promoting effect of Sm3+ toward the electrocatalytic oxidation of methanol was deduced.

Key words: Methanol, Electrochemical oxidation, Sm3+, Promoting catalysis

中图分类号: 

TrendMD: