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The Activation of MnOx-ZrO2 Catalyst in CO Oxidation: Operando XRD Study Full article

Journal Materials Letters
ISSN: 0167-577X , E-ISSN: 1873-4979
Output data Year: 2022, Volume: 315, Article number : 131961, Pages count : 4 DOI: 10.1016/j.matlet.2022.131961
Tags CO oxidation; Manganese oxide; Operando XRD; Solid solution; Zirconia
Authors Bulavchenko O.A. 1 , Vinokurov Z.S. 1,2 , Afonasenko T.N. 3 , Gerasimov E.Yu. 1 , Konovalova V.P. 1
Affiliations
1 Boreskov Institute of Catalysis SB RAS, Lavrentiev Ave. 5, Novosibirsk 630090, Russia
2 Synchrotron Radiation Facility SKIF, Boreskov Institute of Catalysis SB RAS, Nikol'skiy Prospekt 1, Kol'tsovo 630559, Russia
3 Center of New Chemical Technologies BIC, Boreskov Institute of Catalysis SB RAS, Neftezavodskaya 54, Omsk 644040, Russia

Funding (1)

1 Russian Science Foundation 21-73-10218

Abstract: The present study demonstrates that the reduction–oxidation pretreatment leads to an increase in the catalytic activity in CO oxidation for MnOx-ZrO2 catalyst. Crystalline phases present in as-prepared MnOx-ZrO2 catalyst are Mn3O4, Mn2O3 and solid solution (Mn,Zr)O2. By varying the conditions of pretreatment, the following results can be achieved: (1) decomposition of a solid solution; (2) change the ratio and the dispersion of oxides. In CO environment, the reduction of Mn cations occurs both in the volume of the (Mn,Zr)O2 solid solution and in manganese oxides. The reduction process is accompanied by the MnO segregation on the surface of the initial oxides. In an oxygen-containing environment, the reoxidation of surface manganese oxides proceeds with the formation of Mn2O3 and Mn3O4. © 2022 Elsevier B.V.
Cite: Bulavchenko O.A. , Vinokurov Z.S. , Afonasenko T.N. , Gerasimov E.Y. , Konovalova V.P.
The Activation of MnOx-ZrO2 Catalyst in CO Oxidation: Operando XRD Study
Materials Letters. 2022. V.315. 131961 :1-4. DOI: 10.1016/j.matlet.2022.131961 WOS Scopus РИНЦ ANCAN OpenAlex
Dates:
Submitted: Nov 19, 2021
Accepted: Feb 20, 2022
Published online: Feb 22, 2022
Published print: May 15, 2022
Identifiers:
Web of science: WOS:000767830300004
Scopus: 2-s2.0-85125016842
Elibrary: 48183166
Chemical Abstracts: 2022:510403
Chemical Abstracts (print): 179:51066
OpenAlex: W4213263210
Citing:
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Scopus 4
Web of science 4
Elibrary 4
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