Anodic oxidation of methanol on Pt/WO[sub 3] in acidic media

Journal Article · Tue Nov 01 04:00:00 EST 1994 · Journal of the Electrochemical Society; (United States)

DOI:https://doi.org/10.1149/1.2059282· OSTI ID:6681031

Shen, P K; Tseung, A C.C. ^[1]

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1. Univ. of Essex, Colchester (United Kingdom)

The details of the preparation and characterization of co-deposited Pt/WO[sub 3] electrodes are presented. X-ray, scanning, and transmission electron microscopic studies revealed that WO[sub 3] 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/WO[sub 3] 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/WO[sub 3] interface is proposed.

• OSTI ID: 6681031
• Journal Information: Journal of the Electrochemical Society; (United States), Journal Name: Journal of the Electrochemical Society; (United States) Vol. 141:11; ISSN JESOAN; ISSN 0013-4651
• Country of Publication: United States
• Language: English

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