NDLI: Catalytic properties of nanostructured Pd–Ag catalysts in the liquid-phase hydrogenation of terminal and internal alkynes

Content Provider	Springer Nature Link
Author	Rassolov, A. V. Markov, P. V. Bragina, G. O. Baeva, G. N. Mashkovskii, I. S. Yakushev, I. A. Vargaftik, M. N. Stakheev, A. Yu.
Copyright Year	2016
Abstract	A comparative catalytic study of Pd–Ag bimetallic catalysts and the commercial Lindlar catalyst (Pd–Pb/CaCO$_{3}$) has been carried out in the hydrogenation of phenylacetylene (PA) and diphenylacetylene (DPA). The Pd–Ag catalysts have been prepared using the heterobimetallic complex PdAg$_{2}$(OAc)$_{4}$(HOAc)$_{4}$ supported on MgAl$_{2}$O$_{4}$ and aluminas (α-Al$_{2}$O$_{3}$ and γ-Al$_{2}$O$_{3}$). Physicochemical studies have demonstrated that the reduction of supported Pd–Ag complex with hydrogen results in homogeneous Pd–Ag nanoparticles. Equal in selectivity to the Lindlar catalyst, the Pd–Ag catalysts are more active in DPA hydrogenation. The synthesized Pd–Ag catalysts are active and selective in PA hydrogenation as well, but the unfavorable ratio of the rates of the first and second stages of the process makes it difficult to kinetically control the reaction. The most promising results have been obtained for the Pd–Ag$_{2}$/α-Al$_{2}$O$_{3}$ catalyst. Although this catalyst is less active, it is very selective and allows efficient kinetic control of the process to be carried out owing to the fact that, with this catalyst, the rate of hydrogenation of the resulting styrene is much lower than the rate of hydrogenation of the initial PA.
Starting Page	853
Ending Page	858
Page Count	6
File Format	PDF
ISSN	00231584
Journal	Kinetics and Catalysis
Volume Number	57
Issue Number	6
e-ISSN	16083210
Language	English
Publisher	Pleiades Publishing
Publisher Date	2016-12-02
Publisher Place	Moscow
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Pd–Ag liquid-phase hydrogenation bimetallic catalysts nanoparticles terminal alkynes internal alkynes catalyst structure selectivity phenylacetylene diphenylacetylene Catalysis Physical Chemistry
Content Type	Text
Resource Type	Article
Subject	Chemistry Catalysis Modeling and Simulation Computer Science Applications

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