Effect of the Composition of the Reaction Atmosphere on the Thermal Stability of Highly Dispersed Gold Particles on an Oxide Support (Au/Al2O3 System) Full article
| Journal |
Kinetics and Catalysis
ISSN: 0023-1584 , E-ISSN: 1608-3210 |
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| Output data | Year: 2016, Volume: 57, Number: 6, Pages: 831-839 Pages count : 9 DOI: 10.1134/S002315841606015X | ||
| Tags | CO, gold catalysts, oxygen, thermal stability, X-ray photoelectron spectroscopy | ||
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| Affiliations |
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Funding (1)
| 1 | Russian Science Foundation | 14-23-00146 |
Abstract:
Metal gold particles were supported onto the surface of aluminum oxide by physical vapor deposition. The effects of thermal treatments at 30−800°C both in a vacuum and in an atmosphere of O2 (5 mbar), CO (5 mbar), or a mixture of CO + O2 (5 mbar of each) on the samples of Au/Al2O3 were studied by X-ray photoelectron spectroscopy. An increase in the Au4f line intensity in the course of gold deposition was accompanied by a shift of this line toward smaller binding energy. Upon the supporting of a maximum quantity of gold, the binding energy Eb(Au4f7/2) became smaller than the value characteristic of the bulk metal. It was hypothesized that this can be explained by the formation of negatively charged Auδ− particles due to electron density transfer from the support to the particles of gold. In the course of the heating of Au/Al2O3 in a vacuum or in a reaction atmosphere, the agglomeration of small gold particles occurred; this fact manifested itself in a decrease in the atomic ratio [Au]/[Al]. In all of the atmospheres, the Au particles supported on Al2O3 exhibited high thermal stability; considerable changes in the ratio [Au]/[Al] were observed only at temperatures higher than 600°C.
Cite:
Smirnov M.Y.
, Vovk E.I.
, Kalinkin A.V.
, Bukhtiyarov V.I.
Effect of the Composition of the Reaction Atmosphere on the Thermal Stability of Highly Dispersed Gold Particles on an Oxide Support (Au/Al2O3 System)
Kinetics and Catalysis. 2016. V.57. N6. P.831-839. DOI: 10.1134/S002315841606015X WOS Scopus РИНЦ AN OpenAlex
Effect of the Composition of the Reaction Atmosphere on the Thermal Stability of Highly Dispersed Gold Particles on an Oxide Support (Au/Al2O3 System)
Kinetics and Catalysis. 2016. V.57. N6. P.831-839. DOI: 10.1134/S002315841606015X WOS Scopus РИНЦ AN OpenAlex
Original:
Смирнов М.Ю.
, Вовк Е.И.
, Калинкин А.В.
, Бухтияров В.И.
Влияние состава реакционной газовой среды на термическую стабильность высокодисперсных частиц золота на оксидном носителе (система Au/Al2O3)
Кинетика и катализ. 2016. Т.57. №6. С.839-849. DOI: 10.7868/S0453881116060162 РИНЦ OpenAlex
Влияние состава реакционной газовой среды на термическую стабильность высокодисперсных частиц золота на оксидном носителе (система Au/Al2O3)
Кинетика и катализ. 2016. Т.57. №6. С.839-849. DOI: 10.7868/S0453881116060162 РИНЦ OpenAlex
Dates:
| Submitted: | May 17, 2016 |
| Published print: | Nov 1, 2016 |
| Published online: | Dec 2, 2016 |
Identifiers:
| Web of science: | WOS:000389905600014 |
| Scopus: | 2-s2.0-84999779403 |
| Elibrary: | 27581562 |
| Chemical Abstracts: | 2016:1986125 |
| OpenAlex: | W2558830905 |