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Structural and Catalytic Properties of Rh–CeO2/MWCNT Composite Catalysts Full article

Journal Journal of Structural Chemistry
ISSN: 0022-4766 , E-ISSN: 1573-8779
Output data Year: 2024, Volume: 65, Number: 3, Pages: 504-516 Pages count : 13 DOI: 10.1134/s0022476624030077
Tags nanoparticles, clusters, low-temperature CO oxidation, MWCNTs, Rh/CeO2, composite catalyst
Authors Kibis L.S. 1 , Zadesenets A.V. 2 , Kardash T.Yu. 1 , Korenev S.V. 2 , Stonkus O.A. 1 , Slavinskaya E.M. 1 , Podyacheva O.Yu. 1 , Boronin A.I. 1
Affiliations
1 Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
2 Nikolaev Institute of Inorganic Chemistry, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia

Funding (1)

1 Russian Science Foundation 21-13-00094

Abstract: Composite catalysts consisting of Rh–CeOx structures supported on the surface of multi-walled carbon nanotubes (MWCNTs) are studied. For supported active components (Rh, Ce) the rhodium content is maintained constant on the MWCNT surface and the cerium concentration is varied in the range Rhat/Ceat = 0.085-0.34. The obtained samples are investigated by a combination of structural (X-ray diffraction, transmission electron microscopy (TEM)), spectral (X-ray photoelectron spectroscopy (XPS)), and kinetic (temperature-programmed reaction with CO (TPR-CO) and CO+O2 (TPR-CO+O2)) techniques. Highly dispersed CeO2 and RhOx particles are found to form in all samples studied. When the Rhat/Ceat ratio is changed, structures are formed that exhibit the catalytic activity in the CO oxidation reaction for different temperature ranges. At low Rhat/Ceat ratios (< 0.17) the CO conversion is observed at temperatures above 100 °C. When the Rhat/Ceat ratio increases, centers exhibiting the catalytic activity at temperatures below 0 °C are formed in Rh–CeO2/MWCNT catalysts. HR-TEM and TPR-CO studies of composite catalysts with a high Rhat/Ceat ratio reveal that structures based on dispersed oxidized rhodium particles modified by Ce3+ ions can be active species.
Cite: Kibis L.S. , Zadesenets A.V. , Kardash T.Y. , Korenev S.V. , Stonkus O.A. , Slavinskaya E.M. , Podyacheva O.Y. , Boronin A.I.
Structural and Catalytic Properties of Rh–CeO2/MWCNT Composite Catalysts
Journal of Structural Chemistry. 2024. V.65. N3. P.504-516. DOI: 10.1134/s0022476624030077 WOS Scopus РИНЦ AN OpenAlex
Original: Кибис Л.С. , Задесенец А.В. , Кардаш Т.Ю. , Коренев С.В. , Стонкус О.А. , Славинская Е.М. , Подъячева О.Ю. , Боронин А.И.
Структурные и каталитические свойства композитных катализаторов Rh-CeO2/МУНТ
Журнал структурной химии. 2024. Т.65. №3. 123828 . DOI: 10.26902/jsc_id123828 РИНЦ OpenAlex
Dates:
Submitted: Nov 14, 2023
Accepted: Nov 27, 2023
Published print: Mar 1, 2024
Published online: Apr 30, 2024
Identifiers:
Web of science: WOS:001303652800025
Scopus: 2-s2.0-85191786146
Elibrary: 66941223
Chemical Abstracts: 2024:955944
OpenAlex: W4396529012
Citing: Пока нет цитирований
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