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Are Au Nanoparticles on Oxygen-Free Supports Catalytically Active? Full article

Общее Language: Английский, Genre: Full article,
Status: Published, Source type: Original
Journal Topics in Catalysis
ISSN: 1022-5528 , E-ISSN: 1572-9028
Output data Year: 2016, Volume: 59, Number: 5-7, Pages: 469-477 Pages count : 9 DOI: 10.1007/s11244-015-0528-0
Tags CO oxidation, Gold nanoparticles, Gold oxide, Strong metal-support interaction, Surface core-level shift, X-ray photoemission spectra
Authors Klyushin Alexander Yu. 1 , Arrigo Rosa 1 , Youngmi Yi 1 , Xie Zailai 1 , Hävecker Michael 1,2 , Bukhtiyarov Andrey V. 3,4 , Prosvirin Igor P. 3,4 , Bukhtiyarov Valerii I. 3,4 , Knop-Gericke Axel 1 , Schlögl Robert 1
Affiliations
1 Fritz-Haber-Institute der Max Planck Society, Faradayweg 4-6, 14195 Berlin, Germany
2 Division Solar Energy Research, Helmholtz-Zentrum Berlin fur Materialien und Energie GmbH, Albert-Einstein-Str. 15, 12489 Berlin, Germany
3 Boreskov Institute of Catalysis, Pr. Lavrentieva 5, Novosibirsk 630090, Russia
4 Novosibirsk State University, Piragova str. 2, Novosibirsk 630090, Russia

Funding (1)

1 Russian Science Foundation 14-23-00146

Abstract: Gold nanoparticles (Au NPs) on oxygen-free supports were examined using near ambient pressure X-ray photoelectron spectroscopy under CO oxidation conditions, and ex situ using scanning electron microscopy and transmission electron microscopy. Our observations demonstrate that Au NPs supported on carbon materials are inactive, regardless of the preparation method. Ozone (O3) treatment of carbon supports leads oxygen-functionalization of the supports. When subsequently exposed to a CO feed, CO is oxidized by the functionalized sites of the carbon support via a stoichiometric pathway. Microscopy reveals that the reaction with CO does not change the morphology of the Au NPs. In situ XPS reveals that the O3 treatment gives rise to additional Au 4f and O 1s peaks at binding energies of 85.25–85.6 and 529.4–530 eV, respectively, which are assigned to the presence of Au oxide. A surface oxide phase is formed during the activation of Au NPs supported on Au foil by O3 treatment. However, this phase decomposes in vacuum and the remaining low-coordinative atoms do not have sufficient catalytic properties to oxidize CO, so the size reduction of Au NPs and/or oxidation of Au NPs is not sufficient to activate Au.
Cite: Klyushin A.Y. , Arrigo R. , Youngmi Y. , Xie Z. , Hävecker M. , Bukhtiyarov A.V. , Prosvirin I.P. , Bukhtiyarov V.I. , Knop-Gericke A. , Schlögl R.
Are Au Nanoparticles on Oxygen-Free Supports Catalytically Active?
Topics in Catalysis. 2016. V.59. N5-7. P.469-477. DOI: 10.1007/s11244-015-0528-0 publication_identifier_short.wos_identifier_type publication_identifier_short.scopus_identifier_type publication_identifier_short.rinz_identifier_type
Files: Full text from publisher
Dates:
Published online: Jan 11, 2016
Published print: Mar 1, 2016
Identifiers:
publication_identifier.wos_identifier_type WOS:000371424800006
publication_identifier.scopus_identifier_type 2-s2.0-84959513311
publication_identifier.rinz_identifier_type 26981516
publication_identifier.accession_number_identifier_type 2016:61004
publication_identifier.chemical_accession_number_identifier_type 164:294070
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