Study of carbon monoxide oxidation on mesoporous platinum
Study of carbon monoxide oxidation on mesoporous platinum
H1 mesoporous platinum surfaces formed by electrodeposition from lyotropic liquid crystalline templates have high electroactive surface areas (up to 60 m2?g?1) provided by the concave surface within their narrow (?2 nm diameter) pores. In this respect, they are fundamentally different from the flat surfaces of ordinary Pt electrodes or the convex surfaces of high-surface-area Pt nanoparticles. Cyclic voltammetry of H1 mesoporous Pt films in acid solution is identical to that for polycrystalline Pt, suggesting that the surfaces of the pores are made up of low-index Pt faces. In contrast, CO stripping voltammetry on H1 mesoporous Pt is significantly different from the corresponding voltammetry on polycrystalline Pt and shows a clear prewave for CO oxidation and the oxidation CO at lower overpotential. These differences in CO stripping are related to the presence of trough sites where the low-index Pt faces that make up the concave surface of the pore walls meet
2896-2905
Esterle, Thomas F.
d6b3bfa2-0ae5-4ea0-ad94-ee60ef92619b
Russell, Andrea E.
b6b7c748-efc1-4d5d-8a7a-8e4b69396169
Bartlett, Philip N.
d99446db-a59d-4f89-96eb-f64b5d8bb075
September 2010
Esterle, Thomas F.
d6b3bfa2-0ae5-4ea0-ad94-ee60ef92619b
Russell, Andrea E.
b6b7c748-efc1-4d5d-8a7a-8e4b69396169
Bartlett, Philip N.
d99446db-a59d-4f89-96eb-f64b5d8bb075
Esterle, Thomas F., Russell, Andrea E. and Bartlett, Philip N.
(2010)
Study of carbon monoxide oxidation on mesoporous platinum.
ChemPhysChem, 11 (13), .
(doi:10.1002/cphc.201000212).
Abstract
H1 mesoporous platinum surfaces formed by electrodeposition from lyotropic liquid crystalline templates have high electroactive surface areas (up to 60 m2?g?1) provided by the concave surface within their narrow (?2 nm diameter) pores. In this respect, they are fundamentally different from the flat surfaces of ordinary Pt electrodes or the convex surfaces of high-surface-area Pt nanoparticles. Cyclic voltammetry of H1 mesoporous Pt films in acid solution is identical to that for polycrystalline Pt, suggesting that the surfaces of the pores are made up of low-index Pt faces. In contrast, CO stripping voltammetry on H1 mesoporous Pt is significantly different from the corresponding voltammetry on polycrystalline Pt and shows a clear prewave for CO oxidation and the oxidation CO at lower overpotential. These differences in CO stripping are related to the presence of trough sites where the low-index Pt faces that make up the concave surface of the pore walls meet
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Published date: September 2010
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Local EPrints ID: 175195
URI: http://eprints.soton.ac.uk/id/eprint/175195
ISSN: 1439-4235
PURE UUID: 34a9a7ea-aeca-43ae-93fd-3c0cc5d268fc
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Date deposited: 10 Mar 2011 11:56
Last modified: 15 Mar 2024 02:44
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Author:
Thomas F. Esterle
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