Comparative EXAFS and TEM study of Pd/Sibunit and Pd-Ga/Sibunit catalysts for liquid-phase acetylene hydrogenation

The structural characteristics and catalytic properties of Pd/Sibunit and Pd-Ga/Sibunit catalysts for the liquid-phase hydrogenation of acetylene prepared via impregnation of joint alcoholic precursor solutions are studied. A surface film of gallium oxide covering the surfaces of bimetallic particle...

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Bibliographic Details
Published in:Bulletin of the Russian Academy of Sciences. Physics 2015-09, Vol.79 (9), p.1186-1190
Main Authors: Smirnova, N. S., Shlyapin, D. A., Leont’eva, N. N., Trenikhin, M. V., Shitova, N. B., Kochubey, D. I., Tsyrul’nikov, P. G.
Format: Article
Language:English
Subjects:
Acetylene
Bimetals
Catalysis
Catalysts
Ethylene
Gallium
Hadrons
Heavy Ions
Hydrogenation
Nuclear Physics
Physics
Physics and Astronomy
Proceedings of XX Conference “SR-2014”
Selectivity
Surface chemistry
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Summary:The structural characteristics and catalytic properties of Pd/Sibunit and Pd-Ga/Sibunit catalysts for the liquid-phase hydrogenation of acetylene prepared via impregnation of joint alcoholic precursor solutions are studied. A surface film of gallium oxide covering the surfaces of bimetallic particles forms on a sample modified with gallium, leading to partial blocking of its active centers. This explains the lower activity and selectivity to ethylene of Pd-Ga/Sibunit catalyst, relative to Pd/Sibunit.
ISSN:1062-8738
1934-9432
DOI:10.3103/S106287381501030X