Synergistic Catalytic Effect of Cobalt and Cerium in the Preferential Oxidation of Carbon Monoxide on Modified Co/Ce/ZSM-5 Zeolites Научная публикация
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Kinetics and Catalysis
ISSN: 0023-1584 , E-ISSN: 1608-3210 |
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| Вых. Данные | Год: 2021, Том: 62, Номер: 6, Страницы: 798-811 Страниц : 14 DOI: 10.1134/S0023158421060082 | ||||||
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Реферат:
A series of mono- and bimetallic cobalt–cerium catalysts based on ZSM-5 zeolite with different silicate moduli (SiO2/Al2O3 = 30, 55, and 80) was synthesized by incipient wetness impregnation. The atomic ratio of metals (Co + Ce)/Al in bimetallic samples ranged from 0.5 to 1.5. A synergistic catalytic effect of cobalt and cerium in the prepared composites manifested itself in the reactions of total and preferential oxidation of CO (CO-PROX) in an excess of hydrogen. The catalysts in which an atomic ratio between Co and Ce was close to 3 were the most active. In these cases, the conversion of CO in the CO-PROX reaction reached 95% at 190–200°C. With the use of TEM, SEM, and DRIFT spectroscopy of adsorbed CO, including in situ studies of reduction processes under the action of CO, it was found that cobalt oxo cations and mixed cobalt and cerium oxo cations located in exchange positions of the zeolite play a key role in the oxidation reactions. The use of zeolite with SiO2/Al2O3 = 55 provided an optimal balance between the high activity of Co/Ce catalysts in CO oxidation and the selectivity of CO2 formation in the presence of hydrogen.
Библиографическая ссылка:
Ivanin I.A.
, Krotova I.N.
, Udalova O.V.
, Zanaveskin K.L.
, Shilina M.I.
Synergistic Catalytic Effect of Cobalt and Cerium in the Preferential Oxidation of Carbon Monoxide on Modified Co/Ce/ZSM-5 Zeolites
Kinetics and Catalysis. 2021. V.62. N6. P.798-811. DOI: 10.1134/S0023158421060082 WOS Scopus РИНЦ CAPlus OpenAlex
Synergistic Catalytic Effect of Cobalt and Cerium in the Preferential Oxidation of Carbon Monoxide on Modified Co/Ce/ZSM-5 Zeolites
Kinetics and Catalysis. 2021. V.62. N6. P.798-811. DOI: 10.1134/S0023158421060082 WOS Scopus РИНЦ CAPlus OpenAlex
Оригинальная версия:
Иванин И.А.
, Кротова И.Н.
, Удалова О.В.
, Занавескин К.Л.
, Шилина М.И.
Синергизм каталитического действия кобальта и церия в селективном окислении co на модифицированных цеолитах Сo/Ce/ZSM-5
Кинетика и катализ. 2021. Т.62. №6. С.757-772. DOI: 10.31857/S0453881121060083 РИНЦ OpenAlex
Синергизм каталитического действия кобальта и церия в селективном окислении co на модифицированных цеолитах Сo/Ce/ZSM-5
Кинетика и катализ. 2021. Т.62. №6. С.757-772. DOI: 10.31857/S0453881121060083 РИНЦ OpenAlex
Даты:
| Поступила в редакцию: | 4 июн. 2021 г. |
| Принята к публикации: | 28 июл. 2021 г. |
| Опубликована в печати: | 1 нояб. 2021 г. |
| Опубликована online: | 11 янв. 2022 г. |
Идентификаторы БД:
| Web of science: | WOS:000740995000012 |
| Scopus: | 2-s2.0-85122454449 |
| РИНЦ: | 47902060 |
| Chemical Abstracts: | 2022:76435 |
| OpenAlex: | W4206216663 |