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Role of Surface Coverage of Alumina with Pt Nanoparticles Deposited by Laser Electrodispersion in Catalytic CO Oxidation Научная публикация

Журнал Applied Surface Science
ISSN: 0169-4332
Вых. Данные Год: 2021, Том: 536, Номер статьи : 147656, Страниц : 13 DOI: 10.1016/j.apsusc.2020.147656
Ключевые слова Alumina; CO oxidation; Laser electrodispersion; Nanoparticles; Pt catalyst; Surface coverage
Авторы Golubina E.V. 1 , Rostovshchikova T.N. 1 , Lokteva E.S. 1 , Maslakov K.I. 1 , Nikolaev S.A. 1 , Shilina M.I. 1 , Gurevich S.A. 2 , Kozhevin V.M. 2 , Yavsin D.A. 2 , Slavinskaya E.M. 3,4
Организации
1 Lomonosov Moscow State University, Department of Chemistry, Moscow, Russia
2 Ioffe Physico-Technical Institute of RAS, St. Petersburg, Russia
3 Boreskov Institute of Catalysis, SB of RAS, Novosibirsk, Russia
4 Novosibirsk State University, Pirogova St. 2, Novosibirsk, Russia

Информация о финансировании (1)

1 Министерство науки и высшего образования Российской Федерации (с 15 мая 2018)

Реферат: This work elucidates the role of surface coverage of alumina with Pt nanoparticles on the catalyst efficiency in CO oxidation. Size-selected Pt nanoparticles were deposited on the outer surface of alumina pellets by the laser electrodispersion technique. The alumina surface coverage with Pt varied from 0.04 to 3.5 nanoparticle layers and affected the Pt electronic state and catalyst efficiency. Even in the multilayer coatings nanoplatinum particles remained isolated. The catalysts were tested in CO oxidation at CO/O2 ratios of 0.2, 1 and 2 in the temperature-programmed and pulse reaction modes. At CO/O2 = 0.2 the temperature of 50% CO conversion increased with decreasing the surface coverage with Pt particles. At CO/O2 = 2 the decrease in the surface coverage enhanced the catalyst activity. Pt0 dominates only in multilayer catalysts, however, approximately half of platinum remained non-oxidized even at such a low metal loading as 0.01 wt%. The change in the electronic state of platinum under the thermal treatment in the reaction mixture affected the catalyst efficiency. The oxidation state of Pt depended on the metal loading, reaction temperature, CO/O2 ratio in the reaction mixture, mode of its feeding and surface coverage with Pt nanoparticles that influenced the interparticle and particle – support interactions. © 2020
Библиографическая ссылка: Golubina E.V. , Rostovshchikova T.N. , Lokteva E.S. , Maslakov K.I. , Nikolaev S.A. , Shilina M.I. , Gurevich S.A. , Kozhevin V.M. , Yavsin D.A. , Slavinskaya E.M.
Role of Surface Coverage of Alumina with Pt Nanoparticles Deposited by Laser Electrodispersion in Catalytic CO Oxidation
Applied Surface Science. 2021. V.536. 147656 :1-13. DOI: 10.1016/j.apsusc.2020.147656 WOS Scopus РИНЦ CAPlus OpenAlex
Даты:
Поступила в редакцию: 14 июн. 2020 г.
Принята к публикации: 21 авг. 2020 г.
Опубликована online: 28 авг. 2020 г.
Опубликована в печати: 15 янв. 2021 г.
Идентификаторы БД:
Web of science: WOS:000580627000008
Scopus: 2-s2.0-85090554747
РИНЦ: 45338781
Chemical Abstracts: 2020:1821268
OpenAlex: W3082892347
Цитирование в БД:
БД Цитирований
Scopus 17
Web of science 17
РИНЦ 19
OpenAlex 17
Альметрики: