Structural Insight into Strong Pt–CeO2 Interaction: From Single Pt Atoms to PtOx Clusters | Sciact - CRIS-system of Boreskov Institute of Catalysis

Structural Insight into Strong Pt–CeO2 Interaction: From Single Pt Atoms to PtOx Clusters Full article

Journal

The Journal of Physical Chemistry C
ISSN: 1932-7447 , E-ISSN: 1932-7455

Output data

Year: 2019, Volume: 123, Number: 2, Pages: 1320-1334 Pages count : 15 DOI: 10.1021/acs.jpcc.8b11009

Tags

Water-Gas-Shift; Ray Photoelectron-Spectroscopy; Temperature Co Oxidation; Catalytic-Properties; Pt/CeO2 Catalysts; Platinum Nanoparticles; Lattice-Relaxation; Pd/CeO2 Catalysts; Local-Structure; Defect Sites

Authors

Derevyannikova Elizaveta A. ¹ , Kardash Tatyana Yu ^1,2 , Stadnichenko Andrey I. ^1,2 , Stonkus Olga A. ^1,2 , Slavinskaya Elena M. ^1,2 , Svetlichnyi Valery A. ³ , Boronin Andrei I. ^1,2

Affiliations

1	Boreskov Institute of Catalysis, Siberian Branch of the Russian Academy of Sciences, Prospekt Akademika Lavrentieva 5, Novosibirsk 630090, Russia
2	Novosibirsk State University, Pirogova Street 2, Novosibirsk 630090, Russia
3	Tomsk State University, Lenina Av. 36, Tomsk 634050, Russia

Funding (2)

1	Federal Agency for Scientific Organizations	0303-2016-0003
2	Russian Foundation for Basic Research	17-03-00754

Pt–CeO2 nanocomposites were obtained by coprecipitation, varying the Pt loading over a wide range of 1–30 wt %. The samples were calcined in air at 450–1000 °C. The Pt–CeO2 nanocomposites were investigated by a set of structural (X-ray diffraction, extended X-ray absorption fine structure (EXAFS), pair distribution function (PDF), and transmission electron microscopy) and spectroscopic (X-ray photoelectron spectroscopy and Raman spectroscopy) methods. Over the whole range of Pt loading, the main species were Pt2+ and Pt4+. They were localized either in a single-atom state or in the form of PtOx clusters on the ceria surface. The joint PDF and EXAFS modeling based on the combination of [Pt2+O4] single-atom and Pt3O4 structural fragments allowed us to propose the local structure of the PtOx clusters. The formation of such surface structures is associated with a distorted ceria surface on the Pt–CeO2 nanocomposites. We assume that the close arrangement of platinum ions in the PtOx clusters could be responsible for the effective redox properties of the samples.

Derevyannikova E.A. , Kardash T.Y. , Stadnichenko A.I. , Stonkus O.A. , Slavinskaya E.M. , Svetlichnyi V.A. , Boronin A.I.
Structural Insight into Strong Pt–CeO2 Interaction: From Single Pt Atoms to PtOx Clusters
The Journal of Physical Chemistry C. 2019. V.123. N2. P.1320-1334. DOI: 10.1021/acs.jpcc.8b11009 WOS Scopus РИНЦ AN OpenAlex

Submitted:	Nov 13, 2018
Accepted:	Dec 24, 2018
Published online:	Dec 27, 2018
Published print:	Jan 17, 2019

Web of science:	WOS:000456350600035
Scopus:	2-s2.0-85060134355
Elibrary:	38659113
Chemical Abstracts:	2018:2603788
OpenAlex:	W2907267855

DB	Citing
Scopus	85
Web of science	84
Elibrary	74
OpenAlex	84