The Origin of Synergetic Effect in Mixed Mn-Co Oxide with Spinel Structure for Catalytic Oxidation of CO Full article
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Inorganics
, E-ISSN: 2304-6740 |
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| Output data | Year: 2025, Volume: 13, Number: 1, Article number : 8, Pages count : 17 DOI: 10.3390/inorganics13010008 | ||||
| Tags | MnxCo3-xO4 oxides; solid solutions; synergetic effect; CO oxidation | ||||
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| Affiliations |
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Funding (1)
| 1 | Ministry of Science and Higher Education of the Russian Federation | 075-15-2022-263 |
Abstract:
In this work, the origin of the synergetic effect in mixed MnxCo3-xO4 oxides with the spinel structure in the CO oxidation reaction was tested. A series of MnxCo3-x oxide catalysts were synthesized by the coprecipitation method with further calcination at 600 ◦C and varying manganese content from x = 0 to x = 3. The catalysts were characterized using XRD, TEM, N2 adsorption, TPR, EXAFS, and XPS. The catalytic activity of MnxCo3-x oxide catalysts was tested in CO oxidation reactions. The addition of manganese to cobalt oxide results in the formation of mixed Mn-Co oxides based on a cubic or tetragonal spinel structure, a change in microstructural properties, such as surface area and crystal size, as well as local distortions and a decrease in the surface concentration of Co ions and Co in the octahedral sites in spinel structure; it also decreases catalyst reducibility. For all catalysts, the activity of CO oxidation decreases as follows: Mn0.1Co2.9 > Co3O4~Mn0.3Co2.7 > Mn0.5Co2.5 > MnOx > Mn0.7Co2.3 > Mn0.9Co2.1~Mn1.1Co1.9~Mn2.5Co0.5 > Mn2.9Co0.1 >Mn1.7Co1.3 > Mn2.1Co0.9 > Mn1.3Co1.7~Mn1.5Co1.5~Mn2.3Co0.7. The Mn0.1Co2.9 catalyst displays the best catalytic activity, which is attributed to its small crystal size and the maximum surface ratio between Co3+ and Co2+. A further increase in the manganese content (x > 0.3) provokes drastic changes in the catalytic properties due to a decrease in the cobalt content on the surface and in the volume of mixed oxide, changes in the oxidation states of cations, and structure transformation.
Cite:
Bulavchenko O.A.
, Rogov V.A.
, Gerasimov E.Y.
, Aydakov E.E.
, Kremneva A.M.
The Origin of Synergetic Effect in Mixed Mn-Co Oxide with Spinel Structure for Catalytic Oxidation of CO
Inorganics. 2025. V.13. N1. 8 :1-17. DOI: 10.3390/inorganics13010008 WOS Scopus OpenAlex publication_identifier_short.sciact_skif_identifier_type
The Origin of Synergetic Effect in Mixed Mn-Co Oxide with Spinel Structure for Catalytic Oxidation of CO
Inorganics. 2025. V.13. N1. 8 :1-17. DOI: 10.3390/inorganics13010008 WOS Scopus OpenAlex publication_identifier_short.sciact_skif_identifier_type
Dates:
| Submitted: | Nov 27, 2024 |
| Accepted: | Dec 29, 2024 |
| Published online: | Dec 31, 2024 |
| Published print: | Jan 1, 2025 |
Identifiers:
| Web of science: | WOS:001405878400001 |
| Scopus: | 2-s2.0-85216210283 |
| OpenAlex: | W4405968925 |
| publication_identifier.sciact_skif_identifier_type: | 3699 |
Citing:
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