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Abstract:
During the last thirty years the research
field of surface science with its various
disciplines has progressively played a
more and more important role in the
field of catalysis. The main focus of attention
for a long time was research on
metal surfaces, on which, in time, the
whole spectrum of developed surface
analytical methods was applied. This led
to a better understanding of the mechanisms
of catalytic reactions, such as the
synthesis of ammonia and the oxidation
of CO, especially through the work of
Gerhard Ertl.[1,2] In contrast to clean metal surfaces, surfaces of real catalysts
arc complex entities, the structures of
which can have a strong influence on the
processes occurring on the surface.
Thus, it seems logical to employ the typical
structural characteristics and the
morphology of the catalytic surface as
guidelines in the investigation of complex
model systems. In this review the
preparation, and structural and electronic
characterization of such model
systems will be discussed. Clean surfaces
of catalytically active oxides, as well as
model systems for dispersed transition
metal/support catalysts will be characterized
in terms of their morphology and
electronic structure as well as their adsorption
and reaction capabilities.
