Redox and catalytic properties of RhxCe1−xO2−δ solid solution
In this work, a detailed study of the redox properties of solid solution RhxCe1-xO2-δ in correlation with its catalytic activity in CO oxidation reaction was carried out. The ex situ X-ray photoelectron spectroscopy technique was applied to follow the charging states of the elements on the surface d...
| Published in: | The Journal of Physical Chemistry C Vol. 121, № 48. P. 26925-26938 |
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| Other Authors: | , , , , , , |
| Format: | Article |
| Language: | English |
| Subjects: | |
| Online Access: | https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001157871 Перейти в каталог НБ ТГУ |
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| 024 | 7 | |a 10.1021/acs.jpcc.7b09983 |2 doi | |
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| 245 | 1 | 0 | |a Redox and catalytic properties of RhxCe1−xO2−δ solid solution |c L. S. Kibis, T. Yu. Kardash, E. A. Derevyannikova [et al.] |
| 336 | |a Текст | ||
| 337 | |a электронный | ||
| 504 | |a Библиогр.: 85 назв. | ||
| 506 | |a Ограниченный доступ | ||
| 520 | 3 | |a In this work, a detailed study of the redox properties of solid solution RhxCe1-xO2-δ in correlation with its catalytic activity in CO oxidation reaction was carried out. The ex situ X-ray photoelectron spectroscopy technique was applied to follow the charging states of the elements on the surface during the redox treatments at a temperature range of 25-450 °C. The results were compared with the data of temperature-programmed reduction by CO. The dissolution of rhodium in the ceria bulk considerably increased the mobility of CeO2 lattice oxygen, with redox transitions Ce4+ ↔ Ce3+ and Rh3+ ↔ Rhn δ+ observed already at low temperatures (below 150 °C). The reduced rhodium clusters (Rhn δ+) formed during the reduction treatment significantly improved the catalytic activity of the RhxCe1-xO2-δ solid solution. The small size of the rhodium clusters (Rhn δ+) and high defectiveness of the fluorite phase provided the reversibility of Rhn δ+/CeO2 ↔ RhxCe1-xO2-δ transitions upon redox treatment, resulting in the high reproducibility of the CO conversion curves in the temperature-programmed reaction CO + O2. The homogeneous solid solution was stable up to 800 °C. Above this temperature, the CeO2 volume was depleted of Rh3+ ions because of their partial segregation into the surface and/or subsurface layers with the formation of Rh2O3. For these inhomogeneous samples, the oxygen mobility was considerably lower, while the redox transitions, Ce4+ ↔ Ce3+ and Rh3+ ↔ Rhn δ+, required higher temperatures. © 2017 American Chemical Society. | |
| 653 | |a окислительно-восстановительные свойства | ||
| 653 | |a каталитические свойства | ||
| 653 | |a твердые растворы | ||
| 655 | 4 | |a статьи в журналах | |
| 700 | 1 | |a Kibis, Lidiya S. |9 370874 | |
| 700 | 1 | |a Kardash, Tatyana Yu. |9 457067 | |
| 700 | 1 | |a Derevyannikova, Elizaveta A. |9 503282 | |
| 700 | 1 | |a Stonkus, Olga A. |9 138505 | |
| 700 | 1 | |a Slavinskaya, Elena M. |9 138506 | |
| 700 | 1 | |a Svetlichnyi, Valerii A. |9 562988 | |
| 700 | 1 | |a Boronin, Andrei I. |9 106573 | |
| 773 | 0 | |t The Journal of Physical Chemistry C |d 2017 |g Vol. 121, № 48. P. 26925-26938 |x 1932-7447 | |
| 852 | 4 | |a RU-ToGU | |
| 856 | 4 | |u https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001157871 | |
| 856 | |y Перейти в каталог НБ ТГУ |u https://koha.lib.tsu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=1157871 | ||
| 908 | |a статья | ||
| 999 | |c 1157871 |d 1157871 | ||
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