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- Title
Intermetallic Pd-Zn nanoparticles in the selective liquid-phase hydrogenation of substituted alkynes.
- Authors
Mashkovsky, I.; Markov, P.; Bragina, G.; Rassolov, A.; Baeva, G.; Stakheev, A.
- Abstract
A comparative study of the catalytic characteristics of monometallic Pd/α-AlO and bimetallic Pd-Zn/α-AlOcatalysts 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 600°C led to a primary decrease in the activity of Pd-Zn/α-AlO due to the formation and agglomeration of Pd1-Zn1 intermetallic nanoparticles. The Pd-Zn/α-AlO catalyst containing Pd1-Zn1 nanoparticles exhibited increased selectivity to the target alkene formation, as compared with that of Pd/α-AlO. Furthermore, the use of the Pd-Zn/α-AlO 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.
- Subjects
PALLADIUM catalysts; HYDROGENATION; ALKYNES; BIMETALLIC catalysts; METAL nanoparticles
- Publication
Kinetics & Catalysis, 2017, Vol 58, Issue 4, p480
- ISSN
0023-1584
- Publication type
Article
- DOI
10.1134/S0023158417040139