The Surface Chemistry of Osmium Carbonyl Clusters Supported on Silica : An XPS Investigation
An XPS investigation on silica-supported Osmium carbonyl clusters is reported. Different sequences of surface reactions have been followed, evi-dentiating structural modifications of the species involved. The assignment of Os surface compound obtained via oxidation or reduction treatments has been proposed on the basis of a previous identification of particular Os 4f binding energy regions for pure molecular compounds. The possibility of a controlled reduction of supported Os species is proposed on the basis of a range of b. e. values obtained for supported bare metal clusters. Results of an extension of present data to a catalytic test of 1-butene iso-merization are discussed.
KeywordsSurface Reaction Catalytic Test Metal Carbonyl Carbonyl Cluster Control Reduction
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