The activation of MnOx-ZrO2 catalyst in CO oxidation: Operando XRD study Full article
| Journal |
Materials Letters
ISSN: 0167-577X |
||||||
|---|---|---|---|---|---|---|---|
| Output data | Year: 2022, Volume: 315, Article number : 131961, Pages count : 4 DOI: 10.1016/j.matlet.2022.131961 | ||||||
| Tags | Operando XRD, CO oxidation, Manganese oxide, Zirconia Solid solution | ||||||
| Authors |
|
||||||
| Affiliations |
|
Funding (1)
| 1 | Russian Science Foundation | 21-73-10218 (122051600004-3) |
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.
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
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
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 |