Effect of Ce/Zr Composition on Structure and Properties of Ce1−xZrxO2 Oxides and Related Ni/Ce1−xZrxO2 Catalysts for CO2 Methanation

Pakharukova, V.P.; Potemkin, D.I.; Rogozhnikov, V.N.; Stonkus, O.A.; Gorlova, A.M.; Nikitina, N.A.; Suprun, E.A.; Brayko, A.S.; Rogov, V.A.; Snytnikov, P.V.

Авторы: Pakharukova Vera P., Potemkin Dmitriy I., Rogozhnikov Vladimir N., Stonkus Olga A., Gorlova Anna M., Nikitina Nadezhda A., Suprun Evgeniy A., Brayko Andrey S., Rogov Vladimir A., Snytnikov Pavel V.
Журнал: Nanomaterials
Том: 12
Номер: 18
Год издания: 2022
Издательство: MDPI
Местоположение издательства: Basel, Switzerland
Первая страница: 3207-1
Последняя страница: 3207-16
DOI: 10.3390/nano12183207
Аннотация: Ce1−xZrxO2 oxides (x = 0.1, 0.25, 0.5) prepared via the Pechini route were investigatedusing XRD analysis, N2 physisorption, TEM, and TPR in combination with density functional theorycalculations. The Ni/Ce1−xZrxO2 catalysts were characterized via XRD analysis, SEM-EDX, TEMEDX, and CO chemisorption and tested in carbon dioxide methanation. The obtained Ce1−xZrxO2materials were single-phase solid solutions. The increase in Zr content intensified crystal structurestrains and favored the reducibility of the Ce1−xZrxO2 oxides but strongly affected their microstructure. The catalytic activity of the Ni/Ce1−xZrxO2 catalysts was found to depend on the compositionof the Ce1−xZrxO2 supports. The detected negative effect of Zr content on the catalytic activity wasattributed to the decrease in the dispersion of the Ni0 nanoparticles and the length of metal–supportcontacts due to the worsening microstructure of Ce1−xZrxO2 oxides. The improvement of the redoxproperties of the Ce1−xZrxO2 oxide supports through cation modification can be negated by changesin their microstructure and textural characteristics.
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Effect of Ce/Zr Composition on Structure and Properties of Ce1−xZrxO2 Oxides and Related Ni/Ce1−xZrxO2 Catalysts for CO2 Methanationстатья

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