Title: New supported vanadia catalysts for oxidation reactions prepared by sputter deposition
Authors: Poelman, H ×
Sels, Bert
Olea, M
Eufinger, K
Paul, J. S
Moens, Bart
Sack, I
Balcaen, V
Bertinchamps, F
Gaigneaux, E. M
Jacobs, Pierre
Marin, G. B
Poelman, D
De Gryse, R #
Issue Date: Jan-2007
Publisher: Academic Press
Series Title: Journal of Catalysis vol:245 issue:1 pages:156-172
Abstract: Model vanadia catalysts were synthesised using magnetron sputtering of the active species for precisely controlled and clean catalyst design. Two series of supported vanadia catalysts were produced on inert beads with silica surface: vanadia/silica through single vanadia coating and vanadia/titania/silica by subsequent deposition of titania and vanadia. Loadings were varied by changing deposition time. All catalysts were characterised for structure and reducibility. Catalytic performance was tested by steady-state and transient experiments with propane oxidative dehydrogenation. Both supports yielded similar vanadia structures and equal dispersion. The vanadia loading strongly influenced structure and chemical behaviour. Shorter depositions gave surface vanadia monomers and polymers, whereas for longer depositions, crystalline species developed on either support. In propane oxidative dehydrogenation, very high turnover frequencies were obtained, especially for thinner depositions. An intermediate titania layer strongly influenced the vanadia activity. Maximum activity was obtained for a few vanadia layers supported on titania. (c) 2006 Elsevier Inc. All rights reserved.
ISSN: 0021-9517
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Centre for Surface Chemistry and Catalysis
× corresponding author
# (joint) last author

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