Abstract
Tin--antimony oxide catalysts for the selective oxidation of hydrocarbons have been made by precipitation techniques. The dehydration of the amorphous dried precipitate by calcination at increasingly higher temperatures induces the crystallisation of a rutile-related tin dioxide-type phase and the segregation of antimony oxides which volatilise at elevated temperatures. The rutile-related tin dioxide-type phase contains antimony(V) in the bulk and antimony(III) in the surface. Specific catalytic activity for the oxidative dehydrogenation of butene to butadiene is associated with materials with large concentrations of antimony(III) in the surface.
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References
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Berry, F.J. Tin--antimony oxide oxidation catalysts. Hyperfine Interactions 111, 35–37 (1998). https://doi.org/10.1023/A:1012616625473
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DOI: https://doi.org/10.1023/A:1012616625473