Metal particles grown by vapour deposition on clean and well-defined
oxide surfaces are used as model catalysts. These new model catalysts
allow, unlike metal single crystals, a study of size and support
effects in heterogeneous catalysis. The structure, the electronic
properties and the reactivity of these supported model catalysts
have been studied, in situ, by a large number of surface science
techniques. In order to get relevant information from those studies
it is necessary to control the nucleation and growth in order to
get uniform collections of metal particles. The preparation conditions
and the characterisation methods will be reviewed. Particles with
well-defined shapes are obtained by epitaxial growth at high temperature
on clean ordered surfaces. The electronic properties of the small
metal particles depend not only on their size but also on their shape.
The chemisorption properties are strongly related to the surface
structure of the particles. The interplay between the surface structure,
the local electronic properties and the adsorption energy will be
discussed for CO chemisorption. The presence of the support plays
an important role in the control of the particle morphology. Furthermore,
it can increase the adsorption rate. The intrinsic heterogeneity
of the supported model catalysts has to be taken into account to
understand in detail the catalytic reactions. The reaction rate cannot
be considered as an average on the different crystalline facets present
on the particle. Finally, we will discuss the possibility to study
in situ and at the atomic level simple chemical reactions on supported
catalysts.
%0 Journal Article
%1 Henry1998
%A Henry, Claude R.
%D 1998
%J Surf. Sci. Rep.
%K Chemisorption; Electronic Film, Heterogeneous Metal Model Morphology; Oxides; Reaction Reactivity; Single-crystal; Structure; catalysis; catalyst; clusters; mechanism; properties; science} {surface
%P 231-325
%R 10.1016/S0167-5729(98)00002-8
%T Surface studies of supported model catalysts
%V 31
%X Metal particles grown by vapour deposition on clean and well-defined
oxide surfaces are used as model catalysts. These new model catalysts
allow, unlike metal single crystals, a study of size and support
effects in heterogeneous catalysis. The structure, the electronic
properties and the reactivity of these supported model catalysts
have been studied, in situ, by a large number of surface science
techniques. In order to get relevant information from those studies
it is necessary to control the nucleation and growth in order to
get uniform collections of metal particles. The preparation conditions
and the characterisation methods will be reviewed. Particles with
well-defined shapes are obtained by epitaxial growth at high temperature
on clean ordered surfaces. The electronic properties of the small
metal particles depend not only on their size but also on their shape.
The chemisorption properties are strongly related to the surface
structure of the particles. The interplay between the surface structure,
the local electronic properties and the adsorption energy will be
discussed for CO chemisorption. The presence of the support plays
an important role in the control of the particle morphology. Furthermore,
it can increase the adsorption rate. The intrinsic heterogeneity
of the supported model catalysts has to be taken into account to
understand in detail the catalytic reactions. The reaction rate cannot
be considered as an average on the different crystalline facets present
on the particle. Finally, we will discuss the possibility to study
in situ and at the atomic level simple chemical reactions on supported
catalysts.
@article{Henry1998,
abstract = {Metal particles grown by vapour deposition on clean and well-defined
oxide surfaces are used as model catalysts. These new model catalysts
allow, unlike metal single crystals, a study of size and support
effects in heterogeneous catalysis. The structure, the electronic
properties and the reactivity of these supported model catalysts
have been studied, in situ, by a large number of surface science
techniques. In order to get relevant information from those studies
it is necessary to control the nucleation and growth in order to
get uniform collections of metal particles. The preparation conditions
and the characterisation methods will be reviewed. Particles with
well-defined shapes are obtained by epitaxial growth at high temperature
on clean ordered surfaces. The electronic properties of the small
metal particles depend not only on their size but also on their shape.
The chemisorption properties are strongly related to the surface
structure of the particles. The interplay between the surface structure,
the local electronic properties and the adsorption energy will be
discussed for CO chemisorption. The presence of the support plays
an important role in the control of the particle morphology. Furthermore,
it can increase the adsorption rate. The intrinsic heterogeneity
of the supported model catalysts has to be taken into account to
understand in detail the catalytic reactions. The reaction rate cannot
be considered as an average on the different crystalline facets present
on the particle. Finally, we will discuss the possibility to study
in situ and at the atomic level simple chemical reactions on supported
catalysts.},
added-at = {2009-10-30T10:04:05.000+0100},
author = {Henry, Claude R.},
biburl = {https://www.bibsonomy.org/bibtex/2cec1e5a9a2944f384dcd716af1cb3f1b/jfischer},
doi = {10.1016/S0167-5729(98)00002-8},
interhash = {9901b457c47d725762405b3dfee9a532},
intrahash = {cec1e5a9a2944f384dcd716af1cb3f1b},
journal = {Surf. Sci. Rep.},
keywords = {Chemisorption; Electronic Film, Heterogeneous Metal Model Morphology; Oxides; Reaction Reactivity; Single-crystal; Structure; catalysis; catalyst; clusters; mechanism; properties; science} {surface},
pages = {231-325},
timestamp = {2009-10-30T10:04:13.000+0100},
title = {Surface studies of supported model catalysts},
volume = 31,
year = 1998
}