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Influence of copper powder structure on the catalytic properties of cerium oxide
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Influence of copper powder structure on the catalytic properties of cerium oxide
Annotation
PII
S0023476124030173-1
Publication type
Article
Status
Published
Authors
O. M. Zhigalina 
Affiliation: N.N. Semenov Federal Research Center for Chemical Physics RAS
Edition
Volume 69 Issue number 3
Pages
511-521
Abstract
The influence of the structure of copper powder particles on the catalytic activity of the CeO2/Cu catalyst was studied using the methods of X-Ray diffraction, electron microscopy, electron diffraction, energy dispersive X-Ray analysis, as well as programmed temperature reduction of CO (CO-TPR). Nanocomposites were obtained by mechanochemical synthesis using copper particles differing in size and morphology: micron-sized dendrites and nanoparticles. It was shown that the activity of the catalyst obtained from nanosized copper is two times higher, which is due to the presence of CuxO clusters located on the atomic steps of cerium oxide nanocrystals. This arrangement of clusters apparently ensures that the activating centers are not blocked. Thus, the surface structure of cerium oxide particles formed when using nanosized copper powder is a key factor responsible for the catalytic activity.
Acknowledgment
State Research Center of Chemistry and Physics of the Russian Academy of Sciences named after N.N. Semenov (122040500058-1). State Plant Scientific Research Center “Kurchatov Institute”.
Received
04.09.2024
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