Study of Active Surface Centers of Pt/CeO2 Catalysts Prepared Using Radio-Frequency Plasma Sputtering Technique | Sciact - CRIS-система Института катализа

Study of Active Surface Centers of Pt/CeO2 Catalysts Prepared Using Radio-Frequency Plasma Sputtering Technique Научная публикация

Журнал

Surface Science
ISSN: 0039-6028

Вых. Данные

Год: 2019, Том: 679, Страницы: 273-283 Страниц : 11 DOI: 10.1016/j.susc.2018.10.002

Ключевые слова

Platinum; Ceria; Oxygen species; CO oxidation; XPS; DFT calculations; RF-plasma sputtering

Авторы

Stadnichenko Andrey I. ^1,2 , Muravev Valerii V. ² , Koscheev Sergey V. ¹ , Zaikovskii Vladimir I. ^1,2 , Aleksandrov Hristiyan A. ³ , Neyman Konstantin M. ^4,5 , Boronin Andrei I. ^1,2

Организации

1	Boreskov Institute of Catalysis SB RAS, Novosibirsk, Russia
2	Novosibirsk State University, Novosibirsk, Russia
3	Faculty of Chemistry and Pharmacy, University of Sofia, 1126 Sofia, Bulgaria
4	Departament de Ciència dels Materials i Química Física and Institut de Quimica Teòrica i Computacional, Universitat de Barcelona, Barcelona, Spain
5	ICREA (Institució Catalana de Recerca i Estudis Avançats), Barcelona, Spain

Информация о финансировании (8)

1	Федеральное агентство научных организаций России	0303-2016-0003
2	European Commission	692146 H2020-TWINN-2015
3	Фонд „Научни изследвания”	ДН 19/2
4	European Commission	BG05M2OP001-1.001-0008-С01
5	Ministry of Economic Affairs and Digital Transformation	CTQ2015-64618-R
6	Ministry of Economic Affairs and Digital Transformation	MDM-2017-0767
7	Government of Catalonia	2017SGR13
8	Ministry of Education and Vocational Training	PRX17/00348

RF-plasma deposition of Pt on a nanosized ceria powder support has been performed directly in photoelectron spectrometer chambers to prepare model catalysts. The plasma deposition in an oxidizing environment results in the formation of highly dispersed oxide nanoparticles up to 2 nm large, which contain platinum solely as Pt4+ ions revealed by Eb(Pf4f7/2) = 74.6 eV. Thus prepared model catalyst samples arranged as (sub-monolayer) films of PtO2 nanoparticles on the surface of CeO2 are characterized by an increased thermal stability compared with PtO2 nanoparticles deposited on more inert supports. These PtO2/CeO2 model catalysts show a high activity in the CO oxidation even at room temperature. A detailed analysis of the O1s spectra obtained during the titration by CO of PtO2/CeO2 films strongly suggests that the reactive oxygen species are manifested with Eb(O1s) = 530.8 eV and 532.9 eV. The latter core level energies are attributed to oxygen in the platinum dioxide and to peroxide-like oxygen, presumably located at the interface between PtO2 and CeO2 particles. Results of our density-functional calculations indicate that the peroxide-like species can be energetically stabilized at the PtOx–CeO2 interfaces.

Stadnichenko A.I. , Muravev V.V. , Koscheev S.V. , Zaikovskii V.I. , Aleksandrov H.A. , Neyman K.M. , Boronin A.I.
Study of Active Surface Centers of Pt/CeO2 Catalysts Prepared Using Radio-Frequency Plasma Sputtering Technique
Surface Science. 2019. V.679. P.273-283. DOI: 10.1016/j.susc.2018.10.002 WOS Scopus РИНЦ CAPlusCA OpenAlex

Поступила в редакцию:	17 авг. 2018 г.
Принята к публикации:	3 окт. 2018 г.
Опубликована online:	5 окт. 2018 г.
Опубликована в печати:	1 янв. 2019 г.

Web of science:	WOS:000455063000038
Scopus:	2-s2.0-85054784501
РИНЦ:	38630175
Chemical Abstracts:	2018:1930775
Chemical Abstracts (print):	169:498074
OpenAlex:	W2894787151

БД	Цитирований
Scopus	37
Web of science	37
РИНЦ	34
OpenAlex	36