期刊
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
卷 599, 期 2, 页码 221-232出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jelechem.2006.02.024
关键词
Pt nanoparticles; CO monolayer electrooxidation; particle size effects; COads surface mobility; cyclic voltammetry; chronoamperometry
This paper provides further insights into the particle size effects in CO monolayer oxidation. Strong particle size effects are confirmed in the size range from 1.8 to 5 nm. The discrepancies in the literature concerned with the particle size effects in CO monolayer oxidation are reconciled by exploring the influence of the experimental conditions on the stripping voltammograms and chronoamperograms. Evidence supporting the contribution of slow non-electrochemical step to the overall mechanism of CO oxidation is presented. The particle size effects in CO monolayer oxidation are attributed to the size-dependent COads + OHads interaction as well as to the size-dependent COads surface diffusion coefficient. (c) 2006 Elsevier B.V. All rights reserved.
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