Highly selective catalysts for liquid-phase hydrogenation of substituted alkynes based on Pd—Cu bimetallic nanoparticles

Catalytic properties of Pd—Cu bimetallic catalysts supported on SiO 2 and Al 2 O 3 were studied in a model reaction of selective hydrogenation of diphenylacetylene. Application of PdCu 2 (AcO) 6 heterobimetallic acetate complex as a precursor made it possible to obtain homogeneous Pd—Cu bimetallic n...

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Bibliographic Details
Published in:Russian chemical bulletin 2016-02, Vol.65 (2), p.425-431
Main Authors: Mashkovsky, I. S., Markov, P. V., Bragina, G. O., Tkachenko, O. P., Yakushev, I. A., Kozitsyna, N. Yu, Vargaftik, M. N., Stakheev, A. Yu
Format: Article
Language:English
Subjects:
Alkynes
Aluminum oxide
Bimetals
Catalysts
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
Copper
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Hydrogenation
Infrared spectroscopy
Inorganic Chemistry
Liquid phases
Nanoparticles
Organic Chemistry
Palladium
Selectivity
Silicon dioxide
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Summary:Catalytic properties of Pd—Cu bimetallic catalysts supported on SiO 2 and Al 2 O 3 were studied in a model reaction of selective hydrogenation of diphenylacetylene. Application of PdCu 2 (AcO) 6 heterobimetallic acetate complex as a precursor made it possible to obtain homogeneous Pd—Cu bimetallic nanoparticles. This result was supported by the data of IR spectroscopy of adsorbed CO. The Pd-Cu catalysts showed considerably higher selectivity than monometallic samples. Moreover, the introduction of copper decreases the hydrogenation rate of diphenylethylene (DPE) to diphenylethane. As a result, the maximum yield of the target product, DPE, increased from 78 to 93% in the presence of Pd—Cu catalysts.
ISSN:1066-5285
1573-9171
DOI:10.1007/s11172-016-1316-0