CO monolayer oxidation on Pt nanoparticles: Further insights into the particle size effects

被引：203
作者：
Maillard, Frederic
Savinova, Elena R.
Stimming, Ulrich
机构：
[1] Boreskov Inst Catalysis, Novosibirsk 630090, Russia
[2] UJF, UMR CNRS 5631, Lab Electrochim & Physicochim Mat & Interfaces, F-38402 St Martin Dheres, France
[3] Tech Univ Munich, Dept Phys E19, D-85748 Munich, Germany
来源：
JOURNAL OF ELECTROANALYTICAL CHEMISTRY | 2007年 / 599卷 / 02期
关键词：
Pt nanoparticles; CO monolayer electrooxidation; particle size effects; COads surface mobility; cyclic voltammetry; chronoamperometry;
D O I：
10.1016/j.jelechem.2006.02.024
中图分类号：
O65 [分析化学];
学科分类号：
070302 ; 081704 ;
摘要：
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.
引用
收藏
页码：221 / 232
页数：12
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