Study of Active Surface Centers of Pt/CeO2 Catalysts Prepared Using Radio-Frequency Plasma Sputtering Technique | Sciact - CRIS-system of Boreskov Institute of Catalysis

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

Journal

Surface Science
ISSN: 0039-6028

Output data

Year: 2019, Volume: 679, Pages: 273-283 Pages count : 11 DOI: 10.1016/j.susc.2018.10.002

Tags

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

Authors

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

Affiliations

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

Funding (8)

1	Federal Agency for Scientific Organizations	0303-2016-0003
2	European Commission	692146 H2020-TWINN-2015
3	Bulgarian Science Fund	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 ANCAN OpenAlex

Submitted:	Aug 17, 2018
Accepted:	Oct 3, 2018
Published online:	Oct 5, 2018
Published print:	Jan 1, 2019

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

DB	Citing
Scopus	37
Web of science	37
Elibrary	34
OpenAlex	36