Effect of Copper Particle Size on the Surface Structure and Catalytic Activity of Cu–CeO2 Nanocomposites Prepared by Mechanochemical Synthesis in the Preferential CO Oxidation in a H2-Rich Stream (CO-PROX) | Sciact - CRIS-system of Boreskov Institute of Catalysis

Effect of Copper Particle Size on the Surface Structure and Catalytic Activity of Cu–CeO2 Nanocomposites Prepared by Mechanochemical Synthesis in the Preferential CO Oxidation in a H2-Rich Stream (CO-PROX) Full article

Journal

Catalysts
ISSN: 2073-4344

Output data

Year: 2024, Volume: 14, Number: 4, Article number : 222, Pages count : 22 DOI: 10.3390/catal14040222

Tags

Cu–CeO2; mechanochemical synthesis; Cu powder size effect; surface structure–catalytic properties; electron microscopy

Authors

Zhigalina Olga M. ^1,2 , Morozova Olga S. ³ , Khmelenin Dmitry N. ¹ , Firsova Alla A. ³ , Silchenkova Olga V. ³ , Vorobieva Galina A. ³ , Bukhtiyarov Andrey V. ⁴ , Cherkovskiy Evgeny N. ² , Basu Victoria G. ²

Affiliations

1	Shubnikov Institute of Crystallography of Federal Scientific Research Center “Crystallography and Photonics”, Russian Academy of Sciences, Leninskiy Prospekt, 59, 119333 Moscow, Russia
2	Department of Materials and Technology, Bauman Moscow State Technical University, 2nd Baumanskaya St., 105005 Moscow, Russia
3	N.N. Semenov Federal Research Center for Chemical Physics RAS, 4, Kosygin St., 119991 Moscow, Russia
4	Federal Research Center Boreskov Institute of Catalysis SB RAS, 5, Ac. Lavrentieva Ave., 630090 Novosibirsk, Russia

Funding (2)

1	Ministry of Science and Higher Education of the Russian Federation	075-03-2022-061 (122040500058-1)(FFZE-2022-0002)
2	Ministry of Science and Higher Education of the Russian Federation

An effect of Cu powder dispersion and morphology on the surface structure and the physical–chemical and catalytic properties of Cu–CeO2 catalysts prepared by mechanochemical synthesis was studied in the preferential CO oxidation in a H2-rich stream (CO-PROX). Two catalysts, produced by 30 min ball-milling from CeO2 and 8 mass% of copper powders and with particle sizes of several tens (dendrite-like Cu) and 50–200 nm (spherical Cu obtained with levitation-jet method), respectively, were characterized by X-ray diffraction and electron microscopy methods, a temperature-programmed reduction with CO and H2, and with Fourier-transform infrared spectroscopy. The catalyst synthesized from the “large-scale” dendrite-like Cu powder, whose surface consisted of CuxO (Cu+) agglomerates located directly on the surface of facetted CeO2 crystals with a CeO2(111) and CeO2(100) crystal planes exposition, was approximately two times less active at 120–160 °C than the catalyst synthesized from the fine Cu powder, whose surface consisted of CuxO (Cu2+) clusters of 4–6 nm in size located on the steps of facetted CeO2 nanocrystals. Although a large part of CO2 reacted with a ceria surface to give carbonate-like species, no blockage of CO-activating centers was observed due to the surface architecture. The surface structure formed by the use of highly dispersed Cu powder is found to be a key factor responsible for the catalytic activity.

Zhigalina O.M. , Morozova O.S. , Khmelenin D.N. , Firsova A.A. , Silchenkova O.V. , Vorobieva G.A. , Bukhtiyarov A.V. , Cherkovskiy E.N. , Basu V.G.
Effect of Copper Particle Size on the Surface Structure and Catalytic Activity of Cu–CeO2 Nanocomposites Prepared by Mechanochemical Synthesis in the Preferential CO Oxidation in a H2-Rich Stream (CO-PROX)
Catalysts. 2024. V.14. N4. 222 :1-22. DOI: 10.3390/catal14040222 WOS Scopus AN OpenAlex

Submitted:	Jun 1, 2023
Accepted:	Mar 25, 2024
Published online:	Mar 27, 2024
Published print:	Apr 1, 2024

Web of science:	WOS:001220207800001
Scopus:	2-s2.0-85191345682
Chemical Abstracts:	2024:961880
OpenAlex:	W4393235136

Пока нет цитирований