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Boosting the Activity of PdAg2/Al2O3 Supported Catalysts Towards the Selective Acetylene Hydrogenation by Means of CO-Induced Segregation: A Combined NAP XPS and Mass-Spectrometry Study Научная публикация

Журнал Applied Surface Science
ISSN: 0169-4332
Вых. Данные Год: 2022, Том: 604, Номер статьи : 154497, Страниц : 7 DOI: 10.1016/j.apsusc.2022.154497
Ключевые слова Near-ambient pressure X-ray photoelectron spectroscopy; CO adsorption-induced segregation; Pd-Ag bimetallic catalysts; Acetylene hydrogenationIn situ measurements
Авторы Bukhtiyarov A.V. 1 , Panafidin M.A. 1 , Prosvirin I.P. 1 , Mashkovsky I.S. 2 , Markov P.V. 1,2 , Rassolov A.V. 2 , Smirnova N.S. 1,2 , Baeva G.N. 2 , Rameshan C. 3 , Rameshan R. 3 , Zubavichus Y.V. 1 , Bukhtiyarov V.I. 1 , Stakheev A.Yu. 2
Организации
1 Boreskov Institute of Catalysis, Lavrentieva ave. 5, 630090 Novosibirsk, Russian Federation
2 N. D. Zelinsky Institute of Organic Chemistry, Leninsky Prospect 47, 119991 Moscow, Russian Federation
3 Institute of Materials Chemistry, Technische Universität Wien, Getreidemarkt 9/BC/01, 1060 Vienna, Austria

Информация о финансировании (1)

1 Российский научный фонд 19-13-00285-П

Реферат: Selective hydrogenation (or semi-hydrogenation) of acetylene into ethylene is an important industrial process. The aim of the present work is thus to learn regularities governing the CO-induced segregation and elaborate practical procedures for tuning the surface structure of Pd-Ag nanoparticles to improve their catalytic performance towards the selective hydrogenation of acetylene to ethylene. Utilizing NAP XPS the CO adsorption-induced Pd atoms segregation in supported PdAg2/Al2O3 catalysts already at room temperature has been shown. The surface enrichment with Pd further increases if the treatment temperature is increased up to 250 °C. This specific configuration with a redistributed Pd/Ag surface atomic ratio is appreciably stable and self-sustained even at the absence of CO at moderately elevated temperatures. Nevertheless, a reductive treatment in hydrogen at 450 °C reverts the nanoparticle surface structure to the pristine state. Catalytic properties of this peculiar CO-induced configuration of PdAg2/Al2O3 towards the selective acetylene hydrogenation was investigated using a combination of NAP XPS and MS techniques. The PdAg2/Al2O3 catalyst with the surface enriched with Pd due to the CO-induced segregation manifests improved activity with 100 % selectivity under the conditions used. The results obtained clearly demonstrate that CO adsorption-induced segregation is a powerful tool that can be used to optimize the surface composition and catalytic performance of bimetallic nanoparticles.
Библиографическая ссылка: Bukhtiyarov A.V. , Panafidin M.A. , Prosvirin I.P. , Mashkovsky I.S. , Markov P.V. , Rassolov A.V. , Smirnova N.S. , Baeva G.N. , Rameshan C. , Rameshan R. , Zubavichus Y.V. , Bukhtiyarov V.I. , Stakheev A.Y.
Boosting the Activity of PdAg2/Al2O3 Supported Catalysts Towards the Selective Acetylene Hydrogenation by Means of CO-Induced Segregation: A Combined NAP XPS and Mass-Spectrometry Study
Applied Surface Science. 2022. V.604. 154497 :1-7. DOI: 10.1016/j.apsusc.2022.154497 WOS Scopus РИНЦ CAPlusCA OpenAlex
Даты:
Поступила в редакцию: 23 мая 2022 г.
Принята к публикации: 5 авг. 2022 г.
Опубликована online: 10 авг. 2022 г.
Опубликована в печати: 1 дек. 2022 г.
Идентификаторы БД:
Web of science: WOS:000868432100001
Scopus: 2-s2.0-85135793038
РИНЦ: 53763551
Chemical Abstracts: 2022:2126328
Chemical Abstracts (print): 180:54322
OpenAlex: W4291172270
Цитирование в БД:
БД Цитирований
Scopus 13
Web of science 11
РИНЦ 9
OpenAlex 17
Альметрики: