Infrared Spectroscopic Studies of Surface Properties of Mo/SnO2 Catalyst

Infrared Spectroscopic Studies of Surface Properties of Mo/SnO2 Catalyst

Mo/SnO2 catalysts to be used for catalytic oxidation of ethanol and SnO2 were characterized by FTIR using pyridine, carbon monoxide, and methanol as probe molecules. Adding Mo to SnO2 does not modify the acidity of SnO2, but it decreases the number of acid centers. It was observed that in the proces...

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Veröffentlicht in:Journal of catalysis 2002-07, Vol.209 (2), p.427-432
Hauptverfasser: Daturi, Marco, Appel, Lucia Gorenstin
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Catalysis
Catalytic reactions
Chemistry
Exact sciences and technology
General and physical chemistry
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
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description Mo/SnO2 catalysts to be used for catalytic oxidation of ethanol and SnO2 were characterized by FTIR using pyridine, carbon monoxide, and methanol as probe molecules. Adding Mo to SnO2 does not modify the acidity of SnO2, but it decreases the number of acid centers. It was observed that in the process of drying the Mo/SnO2, Mo-isolated tetrahedral species developed on the surface of SnO2. These species are formed by the reaction of Mo7O242− with basic hydroxyl species and probably also with Lewis acid sites. It was possible to observe two kinds of alcooxides at least. One of them is adsorbed on the oxygen of the MoO molybdenil unit and the other on hydroxyl species. The former is active for ethanol oxidation and the latter promotes the formation of by-products.
doi_str_mv 10.1006/jcat.2002.3641
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subjects Catalysis
Catalytic reactions
Chemistry
Exact sciences and technology
General and physical chemistry
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
title Infrared Spectroscopic Studies of Surface Properties of Mo/SnO2 Catalyst
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