ANODIC-OXIDATION OF METHANOL ON PT/WO3 IN ACIDIC MEDIA

被引：252
作者：
SHEN, PK
TSEUNG, ACC
机构：
[1] Chemical Energy Research Centre, Department of Chemistry and Biological Chemistry, University of Essex
来源：
JOURNAL OF THE ELECTROCHEMICAL SOCIETY | 1994年 / 141卷 / 11期
关键词：
D O I：
10.1149/1.2059282
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The details of the preparation and characterization of co-deposited Pt/WO3 electrodes are presented. X-ray, scanning, and transmission electron microscopic studies revealed that WO3 is amorphous and that approximately 40 angstrom Pt crystallites are uniformly dispersed in the deposit. The influence of the deposition conditions and the effect of the solution acidity on the activity of such electrodes for methanol oxidation have been studied. The results demonstrated that the Pt/WO3 electrodes are much more active and more resistant to poisoning than Pt or Pt/Ru alloy catalysts. The reaction mechanism was studied by various electrochemical and surface analysis techniques. A reaction scheme that involves successive stepwise dehydrogenation of methanol, formation/oxidation of hydrogen tungsten bronze, and oxidation of organic intermediates and CO at the Pt/WO3 interface is proposed.
引用
收藏
页码：3082 / 3090
页数：9
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