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Article

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

by
Vera P. Pakharukova
1,*,
Dmitriy I. Potemkin
1,
Vladimir N. Rogozhnikov
1,
Olga A. Stonkus
1,
Anna M. Gorlova
1,2,
Nadezhda A. Nikitina
1,3,
Evgeniy A. Suprun
1,
Andrey S. Brayko
1,
Vladimir A. Rogov
1 and
Pavel V. Snytnikov
1
1
Boreskov Institute of Catalysis SB RAS, Pr. Lavrentieva 5, 630090 Novosibirsk, Russia
2
Department of Natural Sciences, Novosibirsk State University, Pirogova Street 2, 630090 Novosibirsk, Russia
3
Department of Chemistry, Moscow State University, Leninskie Gory St., 1, 119991 Moscow, Russia
*
Author to whom correspondence should be addressed.
Nanomaterials 2022, 12(18), 3207; https://doi.org/10.3390/nano12183207
Submission received: 25 August 2022 / Revised: 10 September 2022 / Accepted: 10 September 2022 / Published: 15 September 2022
(This article belongs to the Special Issue Synthesis of Nanocomposites and Catalysis Applications II)
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Abstract

Ce1−xZrxO2 oxides (x = 0.1, 0.25, 0.5) prepared via the Pechini route were investigated using XRD analysis, N2 physisorption, TEM, and TPR in combination with density functional theory calculations. The Ni/Ce1−xZrxO2 catalysts were characterized via XRD analysis, SEM-EDX, TEM-EDX, and CO chemisorption and tested in carbon dioxide methanation. The obtained Ce1−xZrxO2 materials were single-phase solid solutions. The increase in Zr content intensified crystal structure strains 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 composition of the Ce1−xZrxO2 supports. The detected negative effect of Zr content on the catalytic activity was attributed to the decrease in the dispersion of the Ni0 nanoparticles and the length of metal–support contacts due to the worsening microstructure of Ce1−xZrxO2 oxides. The improvement of the redox properties of the Ce1−xZrxO2 oxide supports through cation modification can be negated by changes in their microstructure and textural characteristics.
Keywords: Ni/Ce1−xZrxO2 catalysts; mixed oxides; structure; microstructure; methanation; carbon dioxide Ni/Ce1−xZrxO2 catalysts; mixed oxides; structure; microstructure; methanation; carbon dioxide
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MDPI and ACS Style

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. Effect of Ce/Zr Composition on Structure and Properties of Ce1−xZrxO2 Oxides and Related Ni/Ce1−xZrxO2 Catalysts for CO2 Methanation. Nanomaterials 2022, 12, 3207. https://doi.org/10.3390/nano12183207

AMA Style

Pakharukova VP, Potemkin DI, Rogozhnikov VN, Stonkus OA, Gorlova AM, Nikitina NA, Suprun EA, Brayko AS, Rogov VA, Snytnikov PV. Effect of Ce/Zr Composition on Structure and Properties of Ce1−xZrxO2 Oxides and Related Ni/Ce1−xZrxO2 Catalysts for CO2 Methanation. Nanomaterials. 2022; 12(18):3207. https://doi.org/10.3390/nano12183207

Chicago/Turabian Style

Pakharukova, Vera P., Dmitriy I. Potemkin, Vladimir N. Rogozhnikov, Olga A. Stonkus, Anna M. Gorlova, Nadezhda A. Nikitina, Evgeniy A. Suprun, Andrey S. Brayko, Vladimir A. Rogov, and Pavel V. Snytnikov. 2022. "Effect of Ce/Zr Composition on Structure and Properties of Ce1−xZrxO2 Oxides and Related Ni/Ce1−xZrxO2 Catalysts for CO2 Methanation" Nanomaterials 12, no. 18: 3207. https://doi.org/10.3390/nano12183207

APA Style

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. (2022). Effect of Ce/Zr Composition on Structure and Properties of Ce1−xZrxO2 Oxides and Related Ni/Ce1−xZrxO2 Catalysts for CO2 Methanation. Nanomaterials, 12(18), 3207. https://doi.org/10.3390/nano12183207

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