期刊
ELECTROCHEMISTRY COMMUNICATIONS
卷 12, 期 3, 页码 359-361出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.elecom.2009.12.034
关键词
Pt(111) electrodes; Surface modification kinetics; Electrochemical oxygen adsorption; Electrocatalysis; Place-exchange disordering
资金
- European Commission [214936-2]
- MICINN [CTQ2006-04071/BQU]
- Generalitat Valenciana [PROMETEO/2009/045]
Electrochemical oxygen adsorption/desorption below monolayer level leads to a disordering of platinum single-crystal surfaces vicinal to the (1 1 1) plane. The kinetics can be described by means of a consecutive reaction from (1 1 1)-terrace sites to (1 1 0)-defect sites, in which (1 0 0)-defects act as intermediates. The first oxidation of the electrode reflects independent contributions from terrace and step sites, the latter being structure sensitive. Oxygen adsorption charges amount to a mean value of one electron per step site. (C) 2009 Elsevier B.V. All rights reserved.
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