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Effect of copper state on the properties of CuOx/TiO2 catalysts for low-temperature CO oxidation Full article

Journal Molecular Catalysis
ISSN: 2468-8231
Output data Year: 2026, Volume: 605, Article number : 116377, Pages count : 12 DOI: 10.1016/j.mcat.2026.116377
Tags CO oxidation, CuOx/TiO2, Heterogeneous catalysts, State of copper, Anatase
Authors Yurpalova Daria V. 1 , Yurpalov Vyacheslav L. 1 , Anoshkina Elena A. 1 , Panafidin Maxim A. 2 , Martyanov Alexander O. 2 , Khramov Evgeny V. 3 , Gulyaeva Tatyana I. 1 , Gerasimov Evgeny Yu. 4
Affiliations
1 Center of New Chemical Technologies BIC, Boreskov Institute of Catalysis, Neftezavodskaya st., 54, Omsk, 644040, Russia
2 Synchrotron Radiation Facility SKIF, Boreskov Institute of Catalysis, Nikolsky Prosp., 1, Kol’tsovo, 630559, Russia
3 National Research Center “Kurchatov Institute”, Kurchatov Square, 1, Moscow 123182, Russia
4 Boreskov Institute of Catalysis, Lavrentiev Ave., 5, Novosibirsk, 630090, Russia

Funding (1)

1 Russian Science Foundation 26-23-20015

Abstract: A comprehensive study of supported CuOx/TiO2 catalysts for low-temperature oxidation of carbon monoxide was conducted. The composition, structure, morphology, electronic state of the active phase for the samples were studied depending on calcination temperature and copper loading by XRD, XANES, EXAFS, HR TEM, EPR, XPS, and H2-TPR. It was found that after calcination of the samples at 300 ◦C, copper on anatase surface is in Cu2+ state. At low concentrations (0.5–1 wt.%), copper exists predominantly as isolated ions and very small CuO clusters. As the copper concentration increases to 4 wt.%, small CuO nanoparticles measuring 1–3 nm are additionally formed. These sites actively engage in redox Cu2+ – Cu+/Cu0 interactions, ensuring high activity in CO oxidation, which was confirmed by XPS. Increasing calcination temperature of catalysts to 500 ◦C activates the sintering of copper clusters, leading to a decrease in activity. CuOx/TiO2 materials demonstrated high activity, stability during 30-hour testing, and 7-hour tolerance to 100 ppm of toxic SO2 impurity. CuOx/TiO2 has been shown to be promising for low-temperature CO oxidation due to the availability of catalyst components and simple synthesis procedure.
Cite: Yurpalova D.V. , Yurpalov V.L. , Anoshkina E.A. , Panafidin M.A. , Martyanov A.O. , Khramov E.V. , Gulyaeva T.I. , Gerasimov E.Y.
Effect of copper state on the properties of CuOx/TiO2 catalysts for low-temperature CO oxidation
Molecular Catalysis. 2026. V.605. 116377 :1-12. DOI: 10.1016/j.mcat.2026.116377
Dates:
Submitted: Aug 7, 2026
Accepted: Sep 30, 2026
Published print: Oct 2, 2026
Published online: Oct 2, 2026
Identifiers: No identifiers
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