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Ex Situ and in Situ Studies of the Structural Features of Ruthenium-Containing Ru/Ce0.75Zr0.25O2 Catalysts of CO2 Methanation Full article

Journal Journal of Structural Chemistry
ISSN: 0022-4766 , E-ISSN: 1573-8779
Output data Year: 2024, Volume: 65, Number: 7, Pages: 1277-1291 Pages count : 15 DOI: 10.1134/s0022476624070011
Tags CO2 methanation, catalysts, ruthenium, mixed cerium-zirconium oxide, powder XRD, XPS, electron microscopy, in situ studies
Authors Kharchenko N.A. 1,2 , Pakharukova V.P. 1,2 , Stonkus O.A. 1 , Rogozhnikov V.N. 1 , Gorlova A.M. 1,2 , Saraev A.A. 1 , Gladky A.Yu. 1 , Potemkin D.I. 1,2
Affiliations
1 Boreskov Institute of Catalysis, Siberian Branch, Russian Academy of Sciences, Novosibirsk, Russia
2 Novosibirsk State University, Novosibirsk, Russia

Funding (1)

1 Russian Science Foundation 21-73-20075

Abstract: Heterogeneous catalysts xRu/Ce0.75Zr0.25O2 (x = 1, 5 wt.%) are prepared by the sorption-hydrolytic precipitation. It is shown that these catalysts are active in the methanation of carbon dioxide. The composition and structural features of these compounds are studied by a complex of methods such as powder XRD, high-resolution electron microscopy, chemisorption, and X-ray photoelectron spectroscopy (XPS). It is established that catalysts obtained by the sorption-hydrolytic method contain the active component in a highly dispersed state. The catalyst with 1 wt.% Ru contains ruthenium compounds in the form of atomic clusters, while that with 5 wt.% Ru contains, along with ultrafine forms, also crystallized ruthenium-containing particles. It is shown that the initial catalysts contain oxide ruthenium compounds that are reduced to the metallic state under the methanation reaction conditions. In situ studies by powder XRD, XPS studies, temperature-programmed reduction in the hydrogen atmosphere (H2-TPR) show that metal ruthenium particles, which were obtained by the activation treatment of the catalysts as a result of heating in a hydrogen-enriched flow, promote the process of the partial reduction of the support material particles due to the spillover effect.
Cite: Kharchenko N.A. , Pakharukova V.P. , Stonkus O.A. , Rogozhnikov V.N. , Gorlova A.M. , Saraev A.A. , Gladky A.Y. , Potemkin D.I.
Ex Situ and in Situ Studies of the Structural Features of Ruthenium-Containing Ru/Ce0.75Zr0.25O2 Catalysts of CO2 Methanation
Journal of Structural Chemistry. 2024. V.65. N7. P.1277-1291. DOI: 10.1134/s0022476624070011 WOS Scopus РИНЦ AN OpenAlex
Original: Харченко Н.А. , Пахарукова В.П. , Стонкус О.А. , Рогожников В.Н. , Горлова А.М. , Сараев А.А. , Гладкий А.Ю. , Потемкин Д.И.
Ex situ и in situ исследования структурных особенностей рутенийсодержащих катализаторов Ru/Ce0.75Zr0.25O2 метанирования CO2
Журнал структурной химии. 2024. Т.65. №7. 128266 . DOI: 10.26902/JSC_id128266 РИНЦ OpenAlex
Dates:
Submitted: Jan 23, 2024
Accepted: Feb 21, 2024
Published print: Jul 26, 2024
Published online: Jul 26, 2024
Identifiers:
Web of science: WOS:001278983100010
Scopus: 2-s2.0-85199752322
Elibrary: 68537984
Chemical Abstracts: 2024:1636932
OpenAlex: W4401010683
Citing: Пока нет цитирований
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