Low-energy ion scattering investigations of catalysts II
Catalysts are adsorption systems that generally are very complex in composition and structure, whose properties are often mainly determined by the outermost chemical species. Ion scattering spectroscopy (ISS) is specifically sensitive to the outermost atomic layer of a surface and is therefore well suited to the analysis of catalytic systems. ISS investigations of real catalyst systems with very rough surfaces and highly insulating supports are made possible by pressing wafers from the powder material and flooding the specimen with electrons during the analysis. The theoretical basis for the investigation of adsorption layers by ISS is presented, together with a discussion of sputtering effects. Phenomena such as the formation of monolayers by solid-solid wetting in supported catalyst systems and the influence of surface roughness on ISS results are also considered.
Bibliographic Reference: Article: NATO ASI Series, Vol. ASI90/030 (1991) pp. 301-311
Record Number: 199210143 / Last updated on: 1994-12-02
Original language: en
Available languages: en