Abstract: CO monolayer oxidation on glassy carbon supported 1–2 nm Pt nanoparticles is studied using potential sweep and potential step methods. The CO stripping peak on the nanoparticles is significantly shifted to positive potentials vs. the corresponding feature at bulk polycrystalline Pt. Current transients at nanoparticulate electrodes are highly asymmetric with a steep rise, maximum at θCO≈0.8–0.9, and a slow decay following t−1/2. The experimental results are compared to the theoretical models of adsorbed CO oxidation described in the literature. A tentative model is suggested to account for the experimental observations, which comprises spatially confined formation of oxygen containing species at active sites, and slow diffusion of CO molecules to the active sites, where they are oxidized. The upper limit of the CO surface diffusion coefficient at Pt nanoparticles is estimated as approximately 4×10−15 cm2 s−1.

Cite: Cherstyuk O.V. , Simonov P.A. , Zaikovskii V.I. , Savinova E.R.
CO Monolayer Oxidation at Pt Nanoparticles Supported on Glassy Carbon Electrodes
Journal of Electroanalytical Chemistry. 2003. V.554-555. P.241-251. DOI: 10.1016/S0022-0728(03)00198-0 WOS Scopus РИНЦ ANCAN OpenAlex

Dates:

Submitted:	Nov 8, 2002
Accepted:	Feb 21, 2003
Published online:	Jul 15, 2003
Published print:	Sep 15, 2003

Identifiers:

Web of science:	WOS:000185658500025
Scopus:	2-s2.0-17544396641
Elibrary:	13443731
Chemical Abstracts:	2003:739182
Chemical Abstracts (print):	140:188954
OpenAlex:	W2033744247

Citing:

DB	Citing
Web of science	92
Scopus	98
Elibrary	96
OpenAlex	94

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