Synergistic Effect of the Catalytic Action of Copper and Cerium in the Oxidation of Carbon Monoxide on Modified Cu/Ce/ZSM-5 Zeolites

Ivanin, I.A.; Kruchinin, T.V.; Udalova, O.V.; Tedeeva, M.A.; Shilina, M.I.

Авторы: Ivanin I.A., Kruchinin T.V., Udalova O.V., Tedeeva M.A., Shilina M.I.
Журнал: Kinetics and Catalysis
Том: 64
Номер: 5
Год издания: 2023
Издательство: Maik Nauka/Interperiodica Publishing
Местоположение издательства: Russian Federation
Первая страница: 655
Последняя страница: 670
DOI: 10.1134/S002315842305004X
Аннотация: A series of mono- and bimetallic copper–cerium catalysts based on ZSM-5 zeolite with different aluminum content (SiO2/Al2O3 = 30 and 55) was synthesized by incipient wetness impregnation. The copper content was 0–4.3 wt %, and cerium loading varied in a range from 0 to 6 wt %. The resulting composites were studied by low-temperature nitrogen adsorption–desorption, X-ray photoelectron spectroscopy (XPS), electron paramagnetic resonance (EPR) spectroscopy, UV–Vis diffuse reflectance spectroscopy, and diffuse reflectance infrared Fourier transform (DRIFT) spectroscopy of adsorbed CO and tested in the catalytic reaction of CO oxidation with oxygen. A pronounced synergistic effect of catalytic action of copper and cerium associated with the redox interaction between the metals was observed in the systems under study. The catalytic activity of the composites monotonically increased with the fraction of cerium in the bimetallic systems (as the Сu : Ce ratio was changed from 6 to 1). In the presence of the most active catalysts, the temperature at which CO conversion reached 50% was about 100°C. A decrease in the aluminum content of the zeolite contributed to higher catalytic activity. It was found that Cu+ ions bound to the surface of CeO2 particles played a key role in catalysis.
Добавил в систему: Иванин Игорь Андреевич

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Synergistic Effect of the Catalytic Action of Copper and Cerium in the Oxidation of Carbon Monoxide on Modified Cu/Ce/ZSM-5 Zeolitesстатья

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