Effect of the Composition of the Reaction Atmosphere on the Thermal Stability of Highly Dispersed Gold Particles on an Oxide Support (Au/Al2O3 System) Научная публикация
| Журнал |
Kinetics and Catalysis
ISSN: 0023-1584 , E-ISSN: 1608-3210 |
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| Вых. Данные | Год: 2016, Том: 57, Номер: 6, Страницы: 831-839 Страниц : 9 DOI: 10.1134/S002315841606015X | ||
| Ключевые слова | CO, gold catalysts, oxygen, thermal stability, X-ray photoelectron spectroscopy | ||
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| Организации |
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Информация о финансировании (1)
| 1 | Российский научный фонд | 14-23-00146 |
Реферат:
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.
Библиографическая ссылка:
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 CAPlus 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 CAPlus OpenAlex
Оригинальная:
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
Даты:
| Поступила в редакцию: | 17 мая 2016 г. |
| Опубликована в печати: | 1 нояб. 2016 г. |
| Опубликована online: | 2 дек. 2016 г. |
Идентификаторы БД:
| Web of science: | WOS:000389905600014 |
| Scopus: | 2-s2.0-84999779403 |
| РИНЦ: | 27581562 |
| Chemical Abstracts: | 2016:1986125 |
| OpenAlex: | W2558830905 |