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In situ Formation of the Active Sites in Pd–Au Bimetallic Nanocatalysts for CO Oxidation: NAP (Near Ambient Pressure) XPS and MS Study Full article

Общее Language: Английский, Genre: Full article,
Status: Published, Source type: Original
Conference Designing Nanoparticle Systems for Catalysis Faraday Discussion
16-18 May 2018 , London
Journal Faraday Discussions
ISSN: 1359-6640 , E-ISSN: 1364-5498
Output data Year: 2018, Volume: 208, Pages: 255-268 Pages count : 14 DOI: 10.1039/c7fd00219j
Tags SURFACE SEGREGATION; ATMOSPHERIC PRESSURES; CATALYTIC-PROPERTIES; ULTRAHIGH-VACUUM; MODEL CATALYSTS; GOLD; ADSORPTION; NANOPARTICLES; NANOALLOYS; AuPd(100)
Authors Bukhtiyarov A.V. 1 , Prosvirin I.P. 1,2 , Saraev A.A. 1,2 , Klyushin A.Yu. 3 , Knop-Gericke A. 3 , Bukhtiyarov V.I. 1,2
Affiliations
1 Boreskov Institute of Catalysis, SB RAS, Lavrentieva Ave. 5, Novosibirsk, Russia
2 Novosibirsk State University, Pirogova Str. 2, Novosibirsk, Russia
3 Fritz-Haber-Institute der Max Planck Society, Faradayweg 4-6, Berlin, Germany

Funding (1)

1 Russian Science Foundation 14-23-00146

Abstract: Model bimetallic Pd–Au/HOPG catalysts have been investigated in the CO oxidation reaction using a combination of NAP XPS and MS techniques. The samples have shown catalytic activity at temperatures above 150 °C. The redistribution of Au and Pd on the surface depending on the reaction conditions has been demonstrated using NAP XPS. The Pd enrichment of the bimetallic particles’ surface under reaction gas mixture has been shown. Apparently, CO adsorption induces Pd segregation on the surface. Heating the sample under reaction conditions above 150 °C decomposes the Pd–CO state due to CO desorption and reaction and simultaneous Pd–Au alloy formation on the surface takes place. Cooling back down to RT results in reversible Pd segregation due to Pd–CO formation and the sample becomes inactive. It has been shown that in situ studies are necessary for investigation of the active sites in Pd–Au bimetallic systems.
Cite: Bukhtiyarov A.V. , Prosvirin I.P. , Saraev A.A. , Klyushin A.Y. , Knop-Gericke A. , Bukhtiyarov V.I.
In situ Formation of the Active Sites in Pd–Au Bimetallic Nanocatalysts for CO Oxidation: NAP (Near Ambient Pressure) XPS and MS Study
Faraday Discussions. 2018. V.208. P.255-268. DOI: 10.1039/c7fd00219j publication_identifier_short.wos_identifier_type publication_identifier_short.scopus_identifier_type publication_identifier_short.rinz_identifier_type
Files: Full text from publisher
Dates:
Submitted: Dec 19, 2017
Accepted: Jan 24, 2018
Published online: Jan 24, 2018
Published print: Aug 1, 2018
Identifiers:
publication_identifier.wos_identifier_type WOS:000444554700013
publication_identifier.scopus_identifier_type 2-s2.0-85051814440
publication_identifier.rinz_identifier_type 35738007
publication_identifier.accession_number_identifier_type 2018:156870
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