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The Structure and Catalytic Properties of Rh-Doped CeO2 Catalysts Full article

Journal PCCP: Physical Chemistry Chemical Physics
ISSN: 1463-9076 , E-ISSN: 1463-9084
Output data Year: 2017, Volume: 19, Number: 47, Pages: 31883-31897 Pages count : 15 DOI: 10.1039/c7cp06573f
Tags METAL-SUPPORT INTERACTION; TEMPERATURE CO OXIDATION; X-RAY; ELECTRONIC INTERACTION; CHEMICAL-PROPERTIES; Pd/CeO2 CATALYSTS; Rh/CeO2 CATALYST; LOCAL-STRUCTURE; SOLID-SOLUTION; NOBLE-METALS
Authors Derevyannikova E.A. 1,2 , Kardash T.Yu. 1,2 , Kibis L.S. 1,2 , Slavinskaya E.M. 1,2 , Svetlichnyi V.A. 3 , Stonkus O.A. 1,2 , Ivanova A.S. 1 , Boronin A.I. 1,2
Affiliations
1 Boreskov Institute of Catalysis SB RAS, Prosp. Akad. Lavrentieva, 5, Novosibirsk, Russia
2 Novosibirsk State University, Pirogova 2, Novosibirsk, Russia
3 Tomsk State University, Lenina. Av. 36, Tomsk, Russia

Funding (1)

1 Federal Agency for Scientific Organizations 0303-2016-0003

Abstract: The average structure and the local structure of nanocrystalline Rh-doped CeO2 catalysts, prepared using a co-precipitation method, were studied using a set of structural (PDF, HRTEM, XRD) and spectral (XPS, Raman spectroscopy) methods. The samples with Rh content less than 10 wt%, calcined at 450 °C, were homogeneous solid solutions. A comparison of the experimental results and Pair distribution function (PDF) modeling data showed that Rh3+ substitutes Ce4+ ions in the fluorite phase. Charge equilibrium is obtained by the oxygen vacancy for each Rh3+ cation introduced into the ceria cell. The solid solution demonstrated high catalytic activity in low-temperature CO oxidation (LTO CO). The solid solutions were stable only in a nanocrystalline state and decomposed upon thermal treatment. The calcination of the solid solution at T > 450 °C results in a decrease in the catalytic activity that is accompanied by Rh association in the subsurface area and strong distortion of the anionic subcell. At T = 800 °C α-Rh2O3 nanoparticles are formed on the surface of the fluorite phase. The XRD-detectable Rh oxide phases are formed after calcination at 1000 °C. However, some parts of Rh within the subsurface RhxCe1−xO2−δ solid solution remain and they preserve catalytic properties for low-temperature oxidation.
Cite: Derevyannikova E.A. , Kardash T.Y. , Kibis L.S. , Slavinskaya E.M. , Svetlichnyi V.A. , Stonkus O.A. , Ivanova A.S. , Boronin A.I.
The Structure and Catalytic Properties of Rh-Doped CeO2 Catalysts
PCCP: Physical Chemistry Chemical Physics. 2017. V.19. N47. P.31883-31897. DOI: 10.1039/c7cp06573f WOS Scopus РИНЦ ANCAN PMID OpenAlex
Dates:
Submitted: Sep 26, 2017
Accepted: Nov 8, 2017
Published online: Nov 9, 2017
Published print: Dec 1, 2017
Identifiers:
Web of science: WOS:000417295800038
Scopus: 2-s2.0-85038353009
Elibrary: 32274796
Chemical Abstracts: 2017:1783986
Chemical Abstracts (print): 168:518003
PMID: 29177291
OpenAlex: W2767377616
Citing:
DB Citing
Web of science 33
Scopus 34
Elibrary 35
OpenAlex 33
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