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Properties of Pd–Ag/C Catalysts in the Reaction of Selective Hydrogenation of Acetylene Научная публикация

Журнал Kinetics and Catalysis
ISSN: 0023-1584 , E-ISSN: 1608-3210
Вых. Данные Год: 2017, Том: 58, Номер: 5, Страницы: 649-654 Страниц : 6 DOI: 10.1134/S0023158417050020
Ключевые слова acetylene, carbon nanofibers, catalyst, hydrogenation, palladium, silver
Авторы Chesnokov V.V. 1,2 , Chichkan A.S. 1,2 , Ismagilov Z.R. 1,2
Организации
1 Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090 Russia
2 Institute of Coal Chemistry and Material Science, Siberian Branch, Russian Academy of Sciences, Kemerovo, 650000 Russia

Информация о финансировании (1)

1 Российский научный фонд 15-13-10043

Реферат: Samples of Pd/C and Pd–Ag/C, where C represents carbon nanofibers (CNFs), are synthesized by methane decomposition on a Ni–Cu–Fe/Al2O3 catalyst. The properties of Pd/CNF are studied in the reaction of selective hydrogenation of acetylene into ethylene. It is found that the activity of the catalyst in hydrogenation reaction increases, while selectivity decreases considerably when the palladium content rises. The obtained dependences are caused by the features of palladium’s interaction with the carbon support. At a low Pd content (up to 0.04 wt %) in the catalyst, the metal is inserted into the interlayer space of graphite and the catalytic activity is zero. It is established by EXAFS that the main share of palladium in catalysts of 0.05–0.1 wt % Pd/CNF constitutes the metal in the atomically dispersed state. The coordination environment of palladium atoms consists of carbon atoms. An increase in the palladium content in a Pd/CNF catalyst up to 0.3 wt % leads to the formation of highly dispersed (0.8–1 nm) Pd particles. The Pd/CNF samples where palladium is mainly in the atomically dispersed state exhibit the highest selectivity in the acetylene hydrogenation reaction. The addition of silver to a 0.1 wt % Pd/CNF catalyst initially probably leads to the formation of Pd–Ag clusters and then to alloyed Pd–Ag particles. An increase in the silver content in the catalyst above 0.3% causes the enlargement of the alloyed particles and the palladium atoms are blocked by a silver layer, which considerably decreases the catalytic activity in the selective hydrogenation of acetylene.
Библиографическая ссылка: Chesnokov V.V. , Chichkan A.S. , Ismagilov Z.R.
Properties of Pd–Ag/C Catalysts in the Reaction of Selective Hydrogenation of Acetylene
Kinetics and Catalysis. 2017. V.58. N5. P.649-654. DOI: 10.1134/S0023158417050020 WOS Scopus РИНЦ CAPlus OpenAlex
Оригинальная: Чесноков В.В. , Чичкань А.С. , Исмагилов З.Р.
Свойства Pd–Ag/С-катализаторов в реакции селективного гидрирования ацетилена
Кинетика и катализ. 2017. Т.58. №5. С.662-667. DOI: 10.7868/S0453881117050021 РИНЦ OpenAlex
Даты:
Поступила в редакцию: 31 янв. 2017 г.
Опубликована в печати: 1 сент. 2017 г.
Опубликована online: 30 сент. 2017 г.
Идентификаторы БД:
Web of science: WOS:000411992000019
Scopus: 2-s2.0-85030652632
РИНЦ: 31062155
Chemical Abstracts: 2017:1586818
OpenAlex: W2760363600
Цитирование в БД:
БД Цитирований
Web of science 24
Scopus 23
РИНЦ 25
OpenAlex 23
Альметрики: