Differences in catalytic properties between mesoporous and nanoparticulate platinum
Differences in catalytic properties between mesoporous and nanoparticulate platinum
Conventional Pt/Al2O3 catalysts prepared by wet-impregnation are composed of Pt nanoparticles exposing convex and facetted surfaces deposited on high-surface area ?-Al2O3 supports. A hexagonal phase mesoporous Pt material (denoted H1-Pt) prepared by chemical reduction in the aqueous domains of a lyotropic liquid crystalline template exposes however mainly a concave surface with expected different catalytic properties. A series of Pt/Al2O3 catalysts were prepared using H1-Pt, Pt-black or wet-impregnated Pt, and the samples were characterized by SEM-EDX and TEM, and finally evaluated for CO oxidation. The H1-Pt/Al2O3 catalyst showed an ignition profile for CO oxidation at lower temperatures and thus appeared less sensitive to CO poisoning than the two other types of samples. This difference may be related to the differences in surface curvature.
209-211
Saramat, A.
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Andersson, M.
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Hant, S.
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Thormahlen, P.
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Skoglundh, M.
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Attard, G.S.
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Palmqvist, A.E.C.
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2007
Saramat, A.
6c892fa3-3041-40ad-917e-86367aa12945
Andersson, M.
9c1009ea-bebf-432c-8302-c204c9708eba
Hant, S.
ca33471a-0d5f-4cb0-be86-a71874349089
Thormahlen, P.
881fbe11-524e-421a-b3f7-1665c8157c76
Skoglundh, M.
a52a8c5e-720e-4f9c-9b50-c7aa5195913b
Attard, G.S.
3219075d-2364-4f00-aeb9-1d90f8cd0d36
Palmqvist, A.E.C.
a914bc9f-f83f-4682-8bd4-8001d119f77d
Saramat, A., Andersson, M., Hant, S., Thormahlen, P., Skoglundh, M., Attard, G.S. and Palmqvist, A.E.C.
(2007)
Differences in catalytic properties between mesoporous and nanoparticulate platinum.
The European Physical Journal D, 43 (1-3), .
(doi:10.1140/epjd/e2007-00124-7).
Abstract
Conventional Pt/Al2O3 catalysts prepared by wet-impregnation are composed of Pt nanoparticles exposing convex and facetted surfaces deposited on high-surface area ?-Al2O3 supports. A hexagonal phase mesoporous Pt material (denoted H1-Pt) prepared by chemical reduction in the aqueous domains of a lyotropic liquid crystalline template exposes however mainly a concave surface with expected different catalytic properties. A series of Pt/Al2O3 catalysts were prepared using H1-Pt, Pt-black or wet-impregnated Pt, and the samples were characterized by SEM-EDX and TEM, and finally evaluated for CO oxidation. The H1-Pt/Al2O3 catalyst showed an ignition profile for CO oxidation at lower temperatures and thus appeared less sensitive to CO poisoning than the two other types of samples. This difference may be related to the differences in surface curvature.
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Published date: 2007
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Local EPrints ID: 54379
URI: http://eprints.soton.ac.uk/id/eprint/54379
ISSN: 1434-6060
PURE UUID: 9e5bdf0b-3313-4112-90d1-6a4864cc9303
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Date deposited: 31 Jul 2008
Last modified: 16 Mar 2024 02:44
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Author:
A. Saramat
Author:
M. Andersson
Author:
S. Hant
Author:
P. Thormahlen
Author:
M. Skoglundh
Author:
A.E.C. Palmqvist
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