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Promotion of the oxidation of carbon monoxide at stepped platinum single-crystal electrodes in alkaline media by lithium and beryllium cations

Promotion of the oxidation of carbon monoxide at stepped platinum single-crystal electrodes in alkaline media by lithium and beryllium cations
Promotion of the oxidation of carbon monoxide at stepped platinum single-crystal electrodes in alkaline media by lithium and beryllium cations
The role of alkali cations (Li+, Na+, K+, Cs+, and Be2+) on the blank voltammetric response and the oxidative stripping of carbon monoxide from stepped Pt single-crystal electrodes in alkaline media has been investigated by cyclic voltammetry. A strong influence of the nature of the cation on both the blank voltammetric profile and the CO oxidation is observed and related to the influence of the cation on the specific adsorption of OH on the platinum surface. Especially Li+ and Be2+ cations markedly affect the adsorption of OH and thereby have a significant promoting effect on COads oxidation. The voltammetric experiments suggest that, on Pt(111), the influence of Li+ (and Be2+) is primarily through a weakening of the repulsive interactions between the OH in the OH adlayer, whereas in the presence of steps also, the onset of OH adsorption is at a lower potential, both on steps and on terraces.
0002-7863
16127-16133
Stoffelsma, Chantal
47406588-a1ee-4452-ade0-4ef9c6db8e6b
Rodriguez, Paramaconi
5a751a4e-490e-42bb-9c22-7b0fc72e9a09
Garcia, Gonzalo
cfbd1986-234a-48aa-a597-1323afda5b15
Garcia-Araez, Nuria
9358a0f9-309c-495e-b6bf-da985ad81c37
Strmcnik, Dusan
dcadac18-e34b-4bd9-915c-b5ec38026d50
Marković, Nenad M.
de098864-7bb0-4746-8591-6f2fd38bfd05
Koper, Marc T. M.
777e24f0-372f-44df-ab65-12bf097b54e0
Stoffelsma, Chantal
47406588-a1ee-4452-ade0-4ef9c6db8e6b
Rodriguez, Paramaconi
5a751a4e-490e-42bb-9c22-7b0fc72e9a09
Garcia, Gonzalo
cfbd1986-234a-48aa-a597-1323afda5b15
Garcia-Araez, Nuria
9358a0f9-309c-495e-b6bf-da985ad81c37
Strmcnik, Dusan
dcadac18-e34b-4bd9-915c-b5ec38026d50
Marković, Nenad M.
de098864-7bb0-4746-8591-6f2fd38bfd05
Koper, Marc T. M.
777e24f0-372f-44df-ab65-12bf097b54e0

Stoffelsma, Chantal, Rodriguez, Paramaconi, Garcia, Gonzalo, Garcia-Araez, Nuria, Strmcnik, Dusan, Marković, Nenad M. and Koper, Marc T. M. (2010) Promotion of the oxidation of carbon monoxide at stepped platinum single-crystal electrodes in alkaline media by lithium and beryllium cations. Journal of the American Chemical Society, 132 (45), 16127-16133. (doi:10.1021/ja106389k).

Record type: Article

Abstract

The role of alkali cations (Li+, Na+, K+, Cs+, and Be2+) on the blank voltammetric response and the oxidative stripping of carbon monoxide from stepped Pt single-crystal electrodes in alkaline media has been investigated by cyclic voltammetry. A strong influence of the nature of the cation on both the blank voltammetric profile and the CO oxidation is observed and related to the influence of the cation on the specific adsorption of OH on the platinum surface. Especially Li+ and Be2+ cations markedly affect the adsorption of OH and thereby have a significant promoting effect on COads oxidation. The voltammetric experiments suggest that, on Pt(111), the influence of Li+ (and Be2+) is primarily through a weakening of the repulsive interactions between the OH in the OH adlayer, whereas in the presence of steps also, the onset of OH adsorption is at a lower potential, both on steps and on terraces.

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More information

Published date: 27 October 2010
Organisations: Electrochemistry

Identifiers

Local EPrints ID: 343109
URI: https://eprints.soton.ac.uk/id/eprint/343109
ISSN: 0002-7863
PURE UUID: dd17f000-49f9-4803-96ea-d926a51ca605
ORCID for Nuria Garcia-Araez: ORCID iD orcid.org/0000-0001-9095-2379

Catalogue record

Date deposited: 24 Sep 2012 14:07
Last modified: 26 Nov 2019 01:36

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