Adsorption-Induced Segregation as a Method for the Target-Oriented Modification of the Surface of a Bimetallic Pd-Ag Catalyst Научная публикация
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Kinetics and Catalysis
ISSN: 0023-1584 , E-ISSN: 1608-3210 |
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| Вых. Данные | Год: 2018, Том: 59, Номер: 5, Страницы: 610-617 Страниц : 8 DOI: 10.1134/S0023158418050154 | ||
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Реферат:
The effect of palladium segregation was studied which resulted from the effect of CO and O-2 on the surface structure and catalytic characteristics of the Pd-Ag-2/Al2O3 catalyst. The IR-spectroscopic study of adsorbed CO showed that Pd-1 centers isolated from each other by silver atoms predominated on the surface of reduced Pd-Ag-2/Al2O3, as evidenced by the almost complete absence of absorption bands typical for the multicentred CO adsorption. In the course of catalyst treatment with CO and O-2, the intensity of absorption bands characteristic of the multicenter CO adsorption considerably increased due to the transformation of a portion of monatomic Pd-1 centers into multiatomic Pd-n ones as a result of the surface segregation of Pd. In this case, a substantial increase in the catalyst activity in the liquid-phase hydrogenation of diphenylacetylene was observed. It was established that, after treatment with CO, the catalyst selectivity for the formation of a target olefin (stilbene) remained almost constant, whereas the treatment with O-2 led to a decrease in the selectivity because of more considerable surface modification.
Библиографическая ссылка:
Stakheev A.Y.
, Smirnova N.S.
, Markov P.V.
, Baeva G.N.
, Bragina G.O.
, Rassolov A.V.
, Mashkovsky I.S.
Adsorption-Induced Segregation as a Method for the Target-Oriented Modification of the Surface of a Bimetallic Pd-Ag Catalyst
Kinetics and Catalysis. 2018. V.59. N5. P.610-617. DOI: 10.1134/S0023158418050154 WOS Scopus РИНЦ CAPlus OpenAlex
Adsorption-Induced Segregation as a Method for the Target-Oriented Modification of the Surface of a Bimetallic Pd-Ag Catalyst
Kinetics and Catalysis. 2018. V.59. N5. P.610-617. DOI: 10.1134/S0023158418050154 WOS Scopus РИНЦ CAPlus OpenAlex
Оригинальная версия:
Стахеев А.Ю.
, Смирнова Н.С.
, Марков П.В.
, Баева Г.Н.
, Брагина Г.О.
, Рассолов А.В.
, Машковский И.С.
Адсорбционно-стимулированная сегрегация как метод направленного модифицирования поверхности биметаллического Pd–Ag-катализатора
Кинетика и катализ. 2018. Т.59. №5. С.601-609. DOI: 10.1134/S0453881118050155 РИНЦ OpenAlex
Адсорбционно-стимулированная сегрегация как метод направленного модифицирования поверхности биметаллического Pd–Ag-катализатора
Кинетика и катализ. 2018. Т.59. №5. С.601-609. DOI: 10.1134/S0453881118050155 РИНЦ OpenAlex
Даты:
| Поступила в редакцию: | 15 мар. 2018 г. |
| Опубликована в печати: | 1 сент. 2018 г. |
| Опубликована online: | 26 сент. 2018 г. |
Идентификаторы БД:
| Web of science: | WOS:000445762600010 |
| Scopus: | 2-s2.0-85053816483 |
| РИНЦ: | 35749652 |
| Chemical Abstracts: | 2018:1804585 |
| OpenAlex: | W2894298317 |