Reference : Highly dispersed platinum catalysts prepared by impregnation of texture-tailored carbon ...
Scientific journals : Article
Engineering, computing & technology : Materials science & engineering
Engineering, computing & technology : Chemical engineering
http://hdl.handle.net/2268/20005
Highly dispersed platinum catalysts prepared by impregnation of texture-tailored carbon xerogels
English
Job, Nathalie mailto [Université de Liège - ULg > Département de chimie appliquée > Génie chimique - Chimie physique appliquée > >]
Ribeiro Pereira, Manuel Fernando [> > > >]
Lambert, Stéphanie mailto [Université de Liège - ULg > Département de chimie appliquée > Génie chimique - Génie catalytique >]
Cabiac, Amandine [> > > >]
Delahay, Gerard [> > > >]
Colomer, Jean-Francois [> > > >]
Marien, José mailto [Université de Liège - ULg > Département de chimie appliquée > Chimie générale et chimie physique >]
Figueiredo, Jose Luis [> > > >]
Pirard, Jean-Paul mailto [Université de Liège - ULg > Département de chimie appliquée > Génie chimique - Chimie physique appliquée > >]
2006
Journal of Catalysis
Academic Press
240
2
160-171
Yes (verified by ORBi)
International
0021-9517
San Diego
CA
[en] carbon support ; Pt catalyst ; hydrogenation ; carbon xerogel
[en] Pt/C catalysts were prepared by impregnation of carbon xerogels with H2PtCl6 aqueous solutions. Three supports with various pore textures were used: two micro-mesoporous (maximum pore size = 10 and 40 nm, respectively) and one micro-macroporous (maximum pore size = 70 nm). After impregnation, drying and reduction, the metal particles were at most 1-1.5 nm in diameter. The Pt dispersion was close to 100% in the case of the xerogel with large mesopores. For the two other supports, a small fraction of Pt was trapped in blocked micropores. The specific catalytic activity obtained for benzene hydrogenation was 4-10 times higher than that obtained with active charcoal-supported catalysts prepared by a similar method. The high dispersion of Pt was attributed to the presence in the xerogel of large mesopore or macropore volumes, which facilitates impregnation, and a low amount of oxygenated surface groups. (c) 2006 Elsevier Inc. All rights reserved.
Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS
http://hdl.handle.net/2268/20005
also: http://hdl.handle.net/2268/19816
10.1016/j.jcat.2006.03.016

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