Effect of the Pore Structure of Nanosilicas Decorated with Cobalt and Cerium Oxides on Catalytic Activity in the Selective Oxidation of Carbon Monoxide

Rostovshchikova, T.N.; Eurov, D.A.; Kurdyukov, D.A.; Tomkovich, M.V.; Yagovkina, M.A.; Ivanin, I.A.; Maslakov, K.I.; Udalova, O.V.; Shilina, M.I.

Авторы: Rostovshchikova T.N., Eurov D.A., Kurdyukov D.A., Tomkovich M.V., Yagovkina M.A., Ivanin I.A., Maslakov K.I., Udalova O.V., Shilina M.I.
Журнал: Russian Journal of Physical Chemistry A
Том: 97
Номер: 9
Год издания: 2023
Издательство: Pleiades Publishing, Ltd
Местоположение издательства: Road Town, United Kingdom
Первая страница: 1978
Последняя страница: 1989
DOI: 10.1134/S0036024423090212
Аннотация: Two types of nanosilicas with different pore structures are synthesized and decorated via impregnation with cobalt and cerium oxides. Meso–microporous spherical silica particles with thin walls of SiO2 nanochannels having specific surface area and pore volume of up to 1400 m2/g and 0.8 cm3/g, respectively, are used. Macroporous three-dimensionally ordered structures based on SiO2 (so-called synthetic opals) consisting of close-packed submicron spherical silica particles with respective porosity characteristics of 11 m2/g and 0.2 cm3/g are also used. The synthesized materials are characterized via low-temperature nitrogen adsorption, X-ray diffraction, SEM, XPS, and Fourier transform IR spectroscopy, and tested as catalysts for the selective oxidation of CO in excess H2 (CO-PROX). The effect of silica, the ratio of introduced oxides, and the order of their introduction on the structure and catalytic properties of Co–Ce/SiO2 are revealed. The catalytic behavior of the synthesized materials is determined from the specificity of interactions among the metal oxides and with the silica surface.
Добавил в систему: Маслаков Константин Игоревич

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Effect of the Pore Structure of Nanosilicas Decorated with Cobalt and Cerium Oxides on Catalytic Activity in the Selective Oxidation of Carbon Monoxideстатья

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