高等学校化学学报

高等学校化学学报 ›› 1998, Vol. 19 ›› Issue (8): 1320.

• 研究快报 • 上一篇    下一篇

铂微粒修饰的氧化钛电极对甲醇的电催化氧化性能

杨辉1, 薛宽宏1, 陆天虹2   

  1. 1. 南京师范大学化学系, 南京, 210097;
    2. 中国科学院长春应用化学研究所, 长春, 130022
  • 收稿日期:1998-01-22 出版日期:1998-08-24 发布日期:1998-08-24
  • 通讯作者: 陆天虹
  • 作者简介:杨辉,男,32岁,博士,讲师.
  • 基金资助:

    厦门大学固体表面物理化学国家重点实验室资助课题.

Electrocatalytic Oxidation of Methanol at the Titanium Oxide Electrode Modified with Pt Microparticles

YANG Hui1, XUE Kuan-Hong1, LU Tian-Hong2   

  1. 1. Department of Chemistry, Nanjing Normal University, Nanjing, 210097;
    2. Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, 130022
  • Received:1998-01-22 Online:1998-08-24 Published:1998-08-24

PDF (PC)

被引次数

38

摘要： 直接甲醇质子交换膜燃料电池(DMPEMFC)可用作未来电动车辆的动力电源,但要达到实际应用还有大量问题有待进一步解决.目前限制DMPEMFC实际应用的主要问题是甲醇阳极氧化催化剂低的活性、高的价格及催化剂的毒化.

关键词: 铂微粒, 氧化钛, 甲醇, 电催化氧化

Abstract: The electrocatalytic oxidation of methanol at the Titanium oxide(TiOx, x <2) film modified with Pt microparticles has been studied. The results show that the modified electrodes exhibit a significant electrocatalytic activity and good stability for the oxidation of methanol. Under the optimal conditions, the peak current density at 0.58 Vfor the oxidation of methanol in the positive-going sweep is about 526 mA/cm2at the scan rate of 5 mV/s in0.5mol/L CH3OH and 0.5 mol/L H2SO4solution and the over potential of the methanol oxidation at the modified electrode increases about 30～40 mV after 70 minutes at the current density of 100 mA/cm2and 50 mA/cm2. The enhanced electrocatalytic activity and good stability are ascribed to the high dispersion of Pt microparticles in and on the TiOx film and the synergistic effect between Pt microparticles and TiOx.

Key words: Pt microparticles, Titanium oxide, Methanol, Electrocatalytic oxidation

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