Unravelling the Cu and Ce effects in MnO2-based catalysts for low-temperature CO oxidation
Cu-containing and Ce-modified OMS-2 catalysts were prepared at various calcination temperatures using the hydrothermal method and tested for low-temperature CO oxidation. The structure, chemical compositions, and physical-chemical properties of the catalysts were characterized using XRD, N2 physisor...
| Published in: | Nanomaterials Vol. 15, № 3. P. 166 (1-18) |
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| Other Authors: | , , , , , |
| Format: | Article |
| Language: | English |
| Subjects: | |
| Online Access: | https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001159547 Перейти в каталог НБ ТГУ |
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| 245 | 1 | 0 | |a Unravelling the Cu and Ce effects in MnO2-based catalysts for low-temperature CO oxidation |c E. D. Blinov, E. V. Kulchakovskaya, N. A. Sokovikov [et al.] |
| 336 | |a Текст | ||
| 337 | |a электронный | ||
| 504 | |a Библиогр.: 60 назв. | ||
| 520 | 3 | |a Cu-containing and Ce-modified OMS-2 catalysts were prepared at various calcination temperatures using the hydrothermal method and tested for low-temperature CO oxidation. The structure, chemical compositions, and physical-chemical properties of the catalysts were characterized using XRD, N2 physisorption, XRF, Raman spectroscopy, SEM, high-resolution TEM with EDX, TPR-H2, and XPS. The incorporation of Cu into the Ce-OMS-2 sample facilitated the transformation of pyrolusite into cryptomelane, as confirmed by Raman spectroscopy data. In the light-off mode, the Cu/Ce-OMS-2-300 and Cu/OMS-2 samples exhibited higher activity in low-temperature CO oxidation (T90 = 115 and 121 ◦C, respectively) compared to sample Cu/Ce-OMS-2-450. After a long-run stability test, the Cu/Ce-OMS-X samples demonstrated excellent performance: the T80 increased by 16% and 7% for the samples calcined at 300 ◦C and 450 ◦C, respectively, while the T80 for the Cu/OMS-2 increased by 40%. The Cu/OMS-2 and Cu/Ce-OMS-2-300 samples were found to have an increased content of nanodispersed copper sites on their surfaces. These copper sites contributed to the formation of the Cu2+-O-Mn4+ interface, which is responsible for the CO oxidation. The presence of Ce3+ in the catalyst was found to increase its stability in the presence of water vapor due to the higher reoxidation ability in comparison with Ce-free sample Cu/OMS-2. | |
| 653 | |a нанодисперсные частицы | ||
| 653 | |a криптомелан | ||
| 653 | |a пиролюзит | ||
| 653 | |a рамановское рассеяние | ||
| 653 | |a низкотемпературное окисление монооксида углерода | ||
| 655 | 4 | |a статьи в журналах | |
| 700 | 1 | |a Blinov, Egor D. |9 990985 | |
| 700 | 1 | |a Kulchakovskaya, Ekaterina V. |9 813897 | |
| 700 | 1 | |a Sokovikov, Nikolai A. |9 990986 | |
| 700 | 1 | |a Svetlichnyi, Valerii A. |9 562988 | |
| 700 | 1 | |a Kulinich, Sergei A. |9 503884 | |
| 700 | 1 | |a Vodyankina, Olga V. |9 36805 | |
| 773 | 0 | |t Nanomaterials |d 2025 |g Vol. 15, № 3. P. 166 (1-18) |x 2079-4991 | |
| 852 | 4 | |a RU-ToGU | |
| 856 | 4 | |u https://vital.lib.tsu.ru/vital/access/manager/Repository/koha:001159547 | |
| 856 | |y Перейти в каталог НБ ТГУ |u https://koha.lib.tsu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=1159547 | ||
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