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化学学报
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化学学报 ›› 2005, Vol. 63 ›› Issue (17): 1565-1569. 上一篇    下一篇

研究论文

Pt-WO3/C电极表面活化对乙二醇和CO氧化的作用

曲微丽1，邬冰1，孙芳1，高颖*1
陆天虹bc，刘长鹏2，邢巍2   

  1. (1哈尔滨师范大学化学系 哈尔滨 150080)
    (2中国科学院长春应用化学研究所 长春 130022)
    (3南京师范大学化学与环境科学学院 南京 210097)
  • 投稿日期:2004-11-23 修回日期:2005-05-13 发布日期:2010-12-10
  • 通讯作者: 高颖

Effect of Surface Treatment on Electrocatalytic Activity of Pt-WO3/C Electrode for Ethylene Glycol and CO Electrooxidation

QU Wei-Li1,WU Bing1,SUN Fang1,GAO Ying*1
LU Tian-Hongbc,LIU Chang-Peng2,XING Wei2   

  1. (1 Department of Chemistry, Harbin Normal University, Harbin 150080)
    (2 Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022)
    (3 College of Chemistry and Environmental Science, Nanjing Normal University, Nanjing 210097)
  • Received:2004-11-23 Revised:2005-05-13 Published:2010-12-10
  • Contact: GAO Ying

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用丙酮和四氢呋喃混合溶液对Pt-WO3/C电极进行表面活化处理后, 乙二醇在Pt-WO3/C电极上的电催化氧化活性大幅度提高. 发现无论在中性溶液中还是在酸性溶液中, 表面活化处理后的Pt-WO3/C电极, 乙二醇的起始氧化电位负移, 氧化峰电流在酸性介质中增加到表面活化处理前的3.2倍; 中性介质中增加到表面处理前的4.7倍, 其主要原因是表面活化处理后, 一方面增加了催化剂Pt的活性表面, 另一方面也促进了电极表面吸附的CO的电氧化, 减少了CO对电极表面的毒化作用.

关键词: 乙二醇, CO, 电催化氧化, 燃料电池

After the Pt-WO3/C electrode was treated with mixed solvent of tetrahydrofuran and acetone, the electrocatalytic activity of the Pt-WO3/C electrode for the ethylene glycol oxidation was significantly increased. The onset potential of the ethylene glycol oxidation was shifted to the negative direction compared with that at the untreated Pt-WO3/C electrode. In the acidic solution, the peak current of the ethylene glycol oxidation at the treated Pt-WO3/C electrode was 3.2 times as large as that at the untreated Pt-WO3/C electrode. In the neutral solution, it became 4.7 times. The main reason is that the treatment can remove the impurity, such as the surfactant introduced in the preparation of the Pt-WO3/C electrode, which changes the surface structure of the electrode to a certain extent and increases the exposure surface area of Pt. In addition, the treatment of the Pt-WO3/C electrode can promote the oxidation of COad, the intermediate of the ethylene glycol oxidation, and thus, decrease the poison effect of the adsorbed CO to the electrode. The treatment method is simple and effective.

Key words: ethylene glycol, CO, electrocatalytic oxidation, fuel cell