Intermetallic Pd1-Zn1 Nanoparticles in the Selective Liquid-Phase Hydrogenation of Substituted Alkynes

被引：14

作者：

Mashkovsky, I. S. ^{[1
]}

Markov, P. V. ^{[1
]}

Bragina, G. O. ^{[1
]}

Rassolov, A. V. ^{[1
]}

Baeva, G. N. ^{[1
]}

Stakheev, A. Yu. ^{[1
]}

机构：

[1] Russian Acad Sci, Zelinsky Inst Organ Chem, Moscow 119991, Russia

来源：

KINETICS AND CATALYSIS | 2017年 / 58卷 / 04期

基金：

俄罗斯科学基金会;

关键词：

Pd-Zn/alpha-Al2O3; selective liquid-phase hydrogenation; intermetallic compound; selectivity; phenylacetylene; diphenylacetylene; 1-phenyl-1-propyne; 1-phenyl-1-butyne; 4-octyne; terminal alkynes; internal alkynes; styrene; HYBRID MOLECULAR-SYSTEMS; PD-IN NANOPARTICLES; PALLADIUM CATALYSTS; SUBSURFACE CARBON; ACETATE COMPLEXES; SEMIHYDROGENATION; ACETYLENE; PHENYLACETYLENE; ALLOY; PERFORMANCE;

D O I：

10.1134/S0023158417040139

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

A comparative study of the catalytic characteristics of monometallic Pd/alpha-Al2O3 and bimetallic Pd-Zn/alpha-Al(2)O(3)catalysts in the liquid-phase hydrogenation of structurally different substituted alkynes (terminal and internal, symmetrical and asymmetrical) was carried out. It was established that an increase in the reduction temperature from 200 to 400 and 600A degrees C led to a primary decrease in the activity of Pd-Zn/alpha-Al2O3 due to the formation and agglomeration of Pd1-Zn1 intermetallic nanoparticles. The Pd-Zn/alpha-Al2O3 catalyst containing Pd1-Zn1 nanoparticles exhibited increased selectivity to the target alkene formation, as compared with that of Pd/alpha-Al2O3. Furthermore, the use of the Pd-Zn/alpha-Al2O3 catalyst made it possible to more effectively perform the kinetic process control of hydrogenation because the rate of an undesirable complete hydrogenation stage decreased on this catalyst.

引用

页码：480 / 491

页数：12

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