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

Frédéric Maillard; Elena R. Savinova; Ulrich Stimming

doi:10.1016/j.jelechem.2006.02.024

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

Frédéric Maillard, Elena R. Savinova, Ulrich Stimming

Department of Physics

Research output: Contribution to journal › Article › peer-review

224 Scopus citations

Abstract

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 CO_ads + OH_ads interaction as well as to the size-dependent CO_ads surface diffusion coefficient.

Original language	English
Pages (from-to)	221-232
Number of pages	12
Journal	Journal of Electroanalytical Chemistry
Volume	599
Issue number	2
DOIs	https://doi.org/10.1016/j.jelechem.2006.02.024
State	Published - 15 Jan 2007

Keywords

CO monolayer electrooxidation
CO surface mobility
Chronoamperometry
Cyclic voltammetry
Particle size effects
Pt nanoparticles

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10.1016/j.jelechem.2006.02.024

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title = "CO monolayer oxidation on Pt nanoparticles: Further insights into the particle size effects",

abstract = "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.",

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AU - Stimming, Ulrich

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AB - 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.

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KW - CO surface mobility

KW - Chronoamperometry

KW - Cyclic voltammetry

KW - Particle size effects

KW - Pt nanoparticles

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

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Keywords

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