Bimetallic Nanostructured Catalysts Prepared by Laser Electrodispersion: Structure and Activity in Redox Reactions. Issue 17 (2nd July 2020)

• Record Type: Journal Article
• Authors: Bryzhin, A. A.; Golubina, E. V.; Maslakov, K. I.; Lokteva, E. S.; Tarkhanova, I. G.; Gurevich, S. A.; Yavsin, D. A.; Rostovshchikova, T. N.
• Is Part Of: ChemCatChem. Volume 12:Issue 17(2020)
• Page Start: 4396
• Page End: 4405
• Publication Date: 2020-07-02
• Subjects: laser electrodispersion -- nanoparticles -- bimetallic catalysts -- heterogeneous catalysis -- oxidation -- carbon monoxide -- thiophene; Catalysis -- Periodicals; 541.39505
• DOI: 10.1002/cctc.202000501
• Languages: English
• ISSNs: 1867-3880

Abstract

Abstract: One‐stage size‐selective method of laser electrodispersion (LED) was used to produce nanostructured NiPd, NiMo and NiW coatings on the surface of alumina, HOPG and Sibunit for the catalytic application. The deposition of nanoparticles produced by LED of bimetallic targets from alloyed or pressed metal powders provides the uniform distribution of both metals on the outer support surface; the metal ratio is similar to that in the original target. The catalytic behaviour of produced "core‐shell" catalysts in comparison with monometallic analogues was tested in two model reactions: the CO oxidation with oxygen on NiPd catalysts supported on alumina and Sibunit; and thiophene oxidation with hydrogen peroxide on NiMo and NiW alumina supported catalysts. Novel LED bimetallic catalysts with extremely low metal content (0.005 %) were superior in terms of activity and stability to monometallic ones and the catalysts obtained by "wet" chemistry methods. Improved catalytic properties of bimetallic LED catalysts are related to the high density of single nanoparticles and the formation of active metal‐oxide interfaces on the support surface. Abstract : Laser electrodispersion : Unusual high catalytic activity in CO and thiophene oxidation was found for low percentage NiPd and NiMo/W catalysts on alumina and carbon supports prepared by laser electrodispersion of targets from alloy or pressed mixture of metal powders.