Bimetallic Au–Pt Nanocomposites in the CO Oxidation Reaction: New Synthetic Approach and Evolution in the Course of Catalysis

A combination of two green chemistry methods—fluid (supercritical carbon dioxide) and metal vapor synthesis—has afforded γ-Al 2 O 3 -based systems modified with Au, Pt, Au–Pt, and Pt–Au nanoparticles. It has been shown that bimetallic nanocomposites in the CO oxidation reaction are more efficient ca...

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Bibliographic Details
Published in:Doklady. Chemistry 2018-12, Vol.483 (1), p.251-255
Main Authors: Budnikov, A. V., Naumkin, A. V., Said-Galiev, E. E., Tret’yakov, V. F., Vasil’kov, A. Yu
Format: Article
Language:English
Subjects:
Aluminum oxide
Bimetals
Carbon dioxide
Carbon monoxide
Catalysis
Chemical synthesis
Chemistry
Chemistry and Materials Science
Chemistry/Food Science
Composition
Evolution
Gold
Industrial Chemistry/Chemical Engineering
Intermetallic compounds
Metal vapors
Nanocomposites
Nanoparticles
Organic chemistry
Oxidation
Photoelectrons
Platinum
Transitional aluminas
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Summary:A combination of two green chemistry methods—fluid (supercritical carbon dioxide) and metal vapor synthesis—has afforded γ-Al 2 O 3 -based systems modified with Au, Pt, Au–Pt, and Pt–Au nanoparticles. It has been shown that bimetallic nanocomposites in the CO oxidation reaction are more efficient catalysts than monometallic systems. The composition of the Au–Pt/Al 2 O 3 intermetallic compound and its evolution in the course of catalysis have been studied by X-ray photoelectron spectroscopy. It has been demonstrated that the increase in system activity during catalysis is accompanied by a significant rearrangement of the structure and composition of the nanocomposite surface.
ISSN:0012-5008
1608-3113
DOI:10.1134/S0012500818110010