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The Structure of Mixed Mn–Co Oxide Catalysts for CO Oxidation Full article

Общее Language: Английский, Genre: Full article,
Status: Published, Source type: Original
Conference XI International Conference Mechanisms of Catalytic Reactions
07-11 Oct 2019 , Сочи
Journal Topics in Catalysis
ISSN: 1022-5528 , E-ISSN: 1572-9028
Output data Year: 2020, Volume: 63, Number: 1-2, Pages: 75-85 Pages count : 11 DOI: 10.1007/s11244-020-01230-1
Tags CO oxidation; Co oxide; Heterogeneous catalysts; Mn oxide; Mn–Co mixed oxides; Solid solution
Authors Bulavchenko O.A. 1,2 , Afonasenko T.N. 3 , Sigaeva S.S. 3 , Ivanchikova A.V. 1,2 , Saraev A.A. 1,2 , Gerasimov E.Yu. 1,2 , Kaichev V.V. 1,2 , Tsybulya S.V. 1,2
Affiliations
1 Boreskov Institute of Catalysis SB RAS, Lavrentiev Ave., 5, Novosibirsk, Russia 630090
2 Novosibirsk State University, Pirogova Str., 2, Novosibirsk, Russia 630090
3 Center of New Chemical Technologies BIC, Neftezavodskaya, 54, Omsk, Russia 644040

Funding (2)

1 Federal Agency for Scientific Organizations 0303-2016-0002
2 Russian Foundation for Basic Research 18-33-00542 (АААА-А18-118042890005-8)

Abstract: A series of Mn5Co1Ox catalysts calcined at different temperatures in the range of 400–800 °C were synthesized by coprecipitation of manganese and cobalt nitrates and tested in the oxidation of CO. The specific surface area, structure, and chemistry of the catalysts were studied. In addition, the reduction of the catalysts by hydrogen was studied using in situ X-ray diffraction and temperature-programmed reduction techniques. It was found that the low-temperature catalyst calcined at 400 °C displays the best catalytic activity, which is attributed to its high surface area, low-temperature reducibility, and a high surface content of Mn4+. The formation of highly disperse and active CoMnO3 species and excess oxygen in a Mn3−xCoxO4+δ spinel leads to excellent low-temperature redox properties. The elevated temperature calcination results in a decline in the catalytic activity in CO oxidation due to formation of a well crystalline Mn3−xCoxO4 spinel, a decrease in the surface area and reducibility.
Cite: Bulavchenko O.A. , Afonasenko T.N. , Sigaeva S.S. , Ivanchikova A.V. , Saraev A.A. , Gerasimov E.Y. , Kaichev V.V. , Tsybulya S.V.
The Structure of Mixed Mn–Co Oxide Catalysts for CO Oxidation
Topics in Catalysis. 2020. V.63. N1-2. P.75-85. DOI: 10.1007/s11244-020-01230-1 publication_identifier_short.wos_identifier_type publication_identifier_short.scopus_identifier_type publication_identifier_short.rinz_identifier_type
Dates:
Published online: Feb 8, 2020
Published print: Mar 1, 2020
Identifiers:
publication_identifier.wos_identifier_type WOS:000516161400001
publication_identifier.scopus_identifier_type 2-s2.0-85079234205
publication_identifier.rinz_identifier_type 43239195
publication_identifier.accession_number_identifier_type 2020:296882
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