Relevance of Spinodal Decomposition for Support Formation and Metal Dispersion in Cogelled Pd/SiO2 Catalysts

[en] The structure formation of cogelled Pd/SiO2 catalysts is followed in situ at the nanometer scale using timeresolved small-angle X-ray scattering (SAXS). The SAXS patterns are analyzed in terms of a reaction-induced spinodal decomposition that is responsible for the formation of the silica support and most likely for the metal dispersion as well. The results are discussed in the light of recent electron tomography characterizations of the catalysts. The latter technique reveals regularity in the metal dispersion, the origin of which is likely to be the very occurrence of a spinodal phase separation.

Disciplines :

Physical, chemical, mathematical & earth Sciences: Multidisciplinary, general & others

Author, co-author :

Gommes, Cédric ; Université de Liège - ULiège > Département de chimie appliquée > Chimie physique appliquée

Goderis, Bart; Katholieke Universiteit Leuven - KUL

Pirard, Jean-Paul ; Université de Liège - ULiège > Département de chimie appliquée > Chimie physique appliquée

Language :

English

Title :

Relevance of Spinodal Decomposition for Support Formation and Metal Dispersion in Cogelled Pd/SiO2 Catalysts

Publication date :

07 July 2007

Journal title :

Journal of Physical Chemistry. C, Nanomaterials and interfaces

ISSN :

1932-7447

eISSN :

1932-7455

Publisher :

American Chemical Society

Volume :

111

Pages :

1150-1156

Peer reviewed :

Peer Reviewed verified by ORBi

Funders :

F.R.S.-FNRS - Fonds de la Recherche Scientifique

Available on ORBi :

since 03 January 2009

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