Structural effects in electrocatalysis. Ethylene glycol oxidation on platinum single-crystal surfaces(Article)
- Institute of Electrochemistry, ICTM, University of Belgrade, Njegoševa 12, P.O. 815, Belgrade Yugoslavia
Abstract
The oxidation of ethylene glycol (EG) has been studied on platinum single-crystal surfaces in 0.1 M NaOH. A strong structural dependence of the reaction kinetics was found for all 12 single-crystal orientations investigated. The onset of the reaction occurs in the sequence Pt (110) > Pt (100) ≈ Pt (111). However, the peaks of the voltammetry curves for the low-index planes decrease in the order (111) > (110) > (100). Either the (111) or the (100) oriented steps cause a decrease in the activity of the (111) plane. Surfaces vicinal to the (100) plane exhibit a higher activity than Pt (100). The (111) oriented steps in the Pt (110) plane cause an increase in activity, while the (100) oriented steps decrease it. A parallelism between PtOH layer formation and the onset of the oxidation of EG was found which indicates that the reaction involves interaction of the adsorbed and dehydrogenated EG with Pt(OH)ads species. © 1991.
Funding details
| Funding sponsor | Funding number | Acronym |
|---|---|---|
| National Science Foundation See opportunities by NSF | 764 | NSF |
-
1
This research was supported by the Research Fund of Serbia, Yugoslavia and by the National Science Foundation, Washington, DC, U.S.A. through the Yugoslavia-American Fund, Contract No. 764.
- ISSN: 00220728
- CODEN: JECHE
- Source Type: Journal
- Original language: English
- DOI: 10.1016/0022-0728(91)85147-H
- Document Type: Article
Marković, N.M.;
© Copyright 2014 Elsevier B.V., All rights reserved.
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