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The Structure of Mixed Mn–Co Oxide Catalysts for CO Oxidation. / Bulavchenko, O. A.; Afonasenko, T. N.; Sigaeva, S. S. и др.
в: Topics in Catalysis, Том 63, № 1-2, 01.03.2020, стр. 75-85.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - The Structure of Mixed Mn–Co Oxide Catalysts for CO Oxidation
AU - Bulavchenko, O. A.
AU - Afonasenko, T. N.
AU - Sigaeva, S. S.
AU - Ivanchikova, A. V.
AU - Saraev, A. A.
AU - Gerasimov, E. Yu
AU - Kaichev, V. V.
AU - Tsybulya, S. V.
N1 - Publisher Copyright: © 2020, Springer Science+Business Media, LLC, part of Springer Nature. Copyright: Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/3/1
Y1 - 2020/3/1
N2 - 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.
AB - 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.
KW - CO oxidation
KW - Co oxide
KW - Heterogeneous catalysts
KW - Mn oxide
KW - Mn–Co mixed oxides
KW - Solid solution
KW - THIN-FILMS
KW - TEMPERATURE-PROGRAMMED REDUCTION
KW - PERFORMANCE
KW - HYDRODESULFURIZATION
KW - TOLUENE
KW - OXYGEN
KW - NANOPARTICLES
KW - SUPPORT
KW - REMOVAL
KW - Mn-Co mixed oxides
KW - VOLATILE ORGANIC-COMPOUNDS
UR - http://www.scopus.com/inward/record.url?scp=85079234205&partnerID=8YFLogxK
U2 - 10.1007/s11244-020-01230-1
DO - 10.1007/s11244-020-01230-1
M3 - Article
AN - SCOPUS:85079234205
VL - 63
SP - 75
EP - 85
JO - Topics in Catalysis
JF - Topics in Catalysis
SN - 1022-5528
IS - 1-2
ER -
ID: 23424930