Effect of Ce/Zr Composition on Structure and Properties of Ce<sub>1−x</sub>Zr<sub>x</sub>O<sub>2</sub> Oxides and Related Ni/Ce<sub>1−x</sub>Zr<sub>x</sub>O<sub>2</sub> Catalysts for CO<sub>2</sub> Methanation
Ce<sub>1−x</sub>Zr<sub>x</sub>O<sub>2</sub> oxides (x = 0.1, 0.25, 0.5) prepared via the Pechini route were investigated using XRD analysis, N<sub>2</sub> physisorption, TEM, and TPR in combination with density functional theory calculations. The Ni/Ce...
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| Format: | Article |
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MDPI AG
2022-09-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/12/18/3207 |
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| author | Vera P. Pakharukova Dmitriy I. Potemkin Vladimir N. Rogozhnikov Olga A. Stonkus Anna M. Gorlova Nadezhda A. Nikitina Evgeniy A. Suprun Andrey S. Brayko Vladimir A. Rogov Pavel V. Snytnikov |
| author_facet | Vera P. Pakharukova Dmitriy I. Potemkin Vladimir N. Rogozhnikov Olga A. Stonkus Anna M. Gorlova Nadezhda A. Nikitina Evgeniy A. Suprun Andrey S. Brayko Vladimir A. Rogov Pavel V. Snytnikov |
| author_sort | Vera P. Pakharukova |
| collection | DOAJ |
| description | Ce<sub>1−x</sub>Zr<sub>x</sub>O<sub>2</sub> oxides (x = 0.1, 0.25, 0.5) prepared via the Pechini route were investigated using XRD analysis, N<sub>2</sub> physisorption, TEM, and TPR in combination with density functional theory calculations. The Ni/Ce<sub>1−x</sub>Zr<sub>x</sub>O<sub>2</sub> catalysts were characterized via XRD analysis, SEM-EDX, TEM-EDX, and CO chemisorption and tested in carbon dioxide methanation. The obtained Ce<sub>1−x</sub>Zr<sub>x</sub>O<sub>2</sub> materials were single-phase solid solutions. The increase in Zr content intensified crystal structure strains and favored the reducibility of the Ce<sub>1−x</sub>Zr<sub>x</sub>O<sub>2</sub> oxides but strongly affected their microstructure. The catalytic activity of the Ni/Ce<sub>1−x</sub>Zr<sub>x</sub>O<sub>2</sub> catalysts was found to depend on the composition of the Ce<sub>1−x</sub>Zr<sub>x</sub>O<sub>2</sub> supports. The detected negative effect of Zr content on the catalytic activity was attributed to the decrease in the dispersion of the Ni<sup>0</sup> nanoparticles and the length of metal–support contacts due to the worsening microstructure of Ce<sub>1−x</sub>Zr<sub>x</sub>O<sub>2</sub> oxides. The improvement of the redox properties of the Ce<sub>1−x</sub>Zr<sub>x</sub>O<sub>2</sub> oxide supports through cation modification can be negated by changes in their microstructure and textural characteristics. |
| first_indexed | 2024-03-09T22:58:33Z |
| format | Article |
| id | doaj.art-dddfc5bfd9f54ae5b73dc6dd7f4b4886 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-09T22:58:33Z |
| publishDate | 2022-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-dddfc5bfd9f54ae5b73dc6dd7f4b48862023-11-23T18:07:20ZengMDPI AGNanomaterials2079-49912022-09-011218320710.3390/nano12183207Effect of Ce/Zr Composition on Structure and Properties of Ce<sub>1−x</sub>Zr<sub>x</sub>O<sub>2</sub> Oxides and Related Ni/Ce<sub>1−x</sub>Zr<sub>x</sub>O<sub>2</sub> Catalysts for CO<sub>2</sub> MethanationVera P. Pakharukova0Dmitriy I. Potemkin1Vladimir N. Rogozhnikov2Olga A. Stonkus3Anna M. Gorlova4Nadezhda A. Nikitina5Evgeniy A. Suprun6Andrey S. Brayko7Vladimir A. Rogov8Pavel V. Snytnikov9Boreskov Institute of Catalysis SB RAS, Pr. Lavrentieva 5, 630090 Novosibirsk, RussiaBoreskov Institute of Catalysis SB RAS, Pr. Lavrentieva 5, 630090 Novosibirsk, RussiaBoreskov Institute of Catalysis SB RAS, Pr. Lavrentieva 5, 630090 Novosibirsk, RussiaBoreskov Institute of Catalysis SB RAS, Pr. Lavrentieva 5, 630090 Novosibirsk, RussiaBoreskov Institute of Catalysis SB RAS, Pr. Lavrentieva 5, 630090 Novosibirsk, RussiaBoreskov Institute of Catalysis SB RAS, Pr. Lavrentieva 5, 630090 Novosibirsk, RussiaBoreskov Institute of Catalysis SB RAS, Pr. Lavrentieva 5, 630090 Novosibirsk, RussiaBoreskov Institute of Catalysis SB RAS, Pr. Lavrentieva 5, 630090 Novosibirsk, RussiaBoreskov Institute of Catalysis SB RAS, Pr. Lavrentieva 5, 630090 Novosibirsk, RussiaBoreskov Institute of Catalysis SB RAS, Pr. Lavrentieva 5, 630090 Novosibirsk, RussiaCe<sub>1−x</sub>Zr<sub>x</sub>O<sub>2</sub> oxides (x = 0.1, 0.25, 0.5) prepared via the Pechini route were investigated using XRD analysis, N<sub>2</sub> physisorption, TEM, and TPR in combination with density functional theory calculations. The Ni/Ce<sub>1−x</sub>Zr<sub>x</sub>O<sub>2</sub> catalysts were characterized via XRD analysis, SEM-EDX, TEM-EDX, and CO chemisorption and tested in carbon dioxide methanation. The obtained Ce<sub>1−x</sub>Zr<sub>x</sub>O<sub>2</sub> materials were single-phase solid solutions. The increase in Zr content intensified crystal structure strains and favored the reducibility of the Ce<sub>1−x</sub>Zr<sub>x</sub>O<sub>2</sub> oxides but strongly affected their microstructure. The catalytic activity of the Ni/Ce<sub>1−x</sub>Zr<sub>x</sub>O<sub>2</sub> catalysts was found to depend on the composition of the Ce<sub>1−x</sub>Zr<sub>x</sub>O<sub>2</sub> supports. The detected negative effect of Zr content on the catalytic activity was attributed to the decrease in the dispersion of the Ni<sup>0</sup> nanoparticles and the length of metal–support contacts due to the worsening microstructure of Ce<sub>1−x</sub>Zr<sub>x</sub>O<sub>2</sub> oxides. The improvement of the redox properties of the Ce<sub>1−x</sub>Zr<sub>x</sub>O<sub>2</sub> oxide supports through cation modification can be negated by changes in their microstructure and textural characteristics.https://www.mdpi.com/2079-4991/12/18/3207Ni/Ce<sub>1−x</sub>Zr<sub>x</sub>O<sub>2</sub> catalystsmixed oxidesstructuremicrostructuremethanationcarbon dioxide |
| spellingShingle | Vera P. Pakharukova Dmitriy I. Potemkin Vladimir N. Rogozhnikov Olga A. Stonkus Anna M. Gorlova Nadezhda A. Nikitina Evgeniy A. Suprun Andrey S. Brayko Vladimir A. Rogov Pavel V. Snytnikov Effect of Ce/Zr Composition on Structure and Properties of Ce<sub>1−x</sub>Zr<sub>x</sub>O<sub>2</sub> Oxides and Related Ni/Ce<sub>1−x</sub>Zr<sub>x</sub>O<sub>2</sub> Catalysts for CO<sub>2</sub> Methanation Nanomaterials Ni/Ce<sub>1−x</sub>Zr<sub>x</sub>O<sub>2</sub> catalysts mixed oxides structure microstructure methanation carbon dioxide |
| title | Effect of Ce/Zr Composition on Structure and Properties of Ce<sub>1−x</sub>Zr<sub>x</sub>O<sub>2</sub> Oxides and Related Ni/Ce<sub>1−x</sub>Zr<sub>x</sub>O<sub>2</sub> Catalysts for CO<sub>2</sub> Methanation |
| title_full | Effect of Ce/Zr Composition on Structure and Properties of Ce<sub>1−x</sub>Zr<sub>x</sub>O<sub>2</sub> Oxides and Related Ni/Ce<sub>1−x</sub>Zr<sub>x</sub>O<sub>2</sub> Catalysts for CO<sub>2</sub> Methanation |
| title_fullStr | Effect of Ce/Zr Composition on Structure and Properties of Ce<sub>1−x</sub>Zr<sub>x</sub>O<sub>2</sub> Oxides and Related Ni/Ce<sub>1−x</sub>Zr<sub>x</sub>O<sub>2</sub> Catalysts for CO<sub>2</sub> Methanation |
| title_full_unstemmed | Effect of Ce/Zr Composition on Structure and Properties of Ce<sub>1−x</sub>Zr<sub>x</sub>O<sub>2</sub> Oxides and Related Ni/Ce<sub>1−x</sub>Zr<sub>x</sub>O<sub>2</sub> Catalysts for CO<sub>2</sub> Methanation |
| title_short | Effect of Ce/Zr Composition on Structure and Properties of Ce<sub>1−x</sub>Zr<sub>x</sub>O<sub>2</sub> Oxides and Related Ni/Ce<sub>1−x</sub>Zr<sub>x</sub>O<sub>2</sub> Catalysts for CO<sub>2</sub> Methanation |
| title_sort | effect of ce zr composition on structure and properties of ce sub 1 x sub zr sub x sub o sub 2 sub oxides and related ni ce sub 1 x sub zr sub x sub o sub 2 sub catalysts for co sub 2 sub methanation |
| topic | Ni/Ce<sub>1−x</sub>Zr<sub>x</sub>O<sub>2</sub> catalysts mixed oxides structure microstructure methanation carbon dioxide |
| url | https://www.mdpi.com/2079-4991/12/18/3207 |
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