Variation of the Catalytic Activity and Selectivity of Cobalt in Ethylene Oxidation during Stepwise Oxidation of the Cobalt Surface Научная публикация
| Журнал |
Kinetics and Catalysis
ISSN: 0023-1584 , E-ISSN: 1608-3210 |
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| Вых. Данные | Год: 2023, Том: 64, Номер: 6, Страницы: 837–848 Страниц : DOI: 10.1134/S0023158423060046 | ||
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Реферат:
The dependence of the catalytic activity of Co foil in ethylene oxidation on the degree of oxidation of the Co surface during stepwise oxidation of foil has been studied. The experiments were performed at 500–800°C by the pulse method using alternating pulses of a 0.2%C2H4–0.25%O2–1%Ar–He test mixture and a 1%O2–1%Ar–He oxidative mixture. The degree of oxidation of the Co foil surface varied from total reduction to oxidation of ~100 cobalt oxide “monolayers.” The XRD, SEM, and EDS studies showed that CoO formed at the first stage of stepwise oxidation (from 0 to ~60 oxide “monolayers”) at all temperatures under study, and changes in the surface morphology could be observed. In this state the samples had a relatively high activity in both partial and total oxidation of ethylene at 500–600°C. At 700–800°C, however, there was no total oxidation, and the rate of partial oxidation was much lower than at 500–600°C. At the second stage of Co surface oxidation (from ~60 to ~120 oxide “monolayers”) at 500–600°C, Co3O4 formed, and gradual ordering of oxide crystals was observed. In this state, the samples exhibited constant (at 500°C) or extreme (at 600°C) activity in the total oxidation of ethylene. In contrast, an increase in the temperature to 800°C led to a drastic decrease in the catalytic activity of Co foil in the given range of the degrees of oxidation.
Библиографическая ссылка:
Bychkov V.Y.
, Tulenin Y.P.
, Gulin A.A.
, Korchak V.N.
Variation of the Catalytic Activity and Selectivity of Cobalt in Ethylene Oxidation during Stepwise Oxidation of the Cobalt Surface
Kinetics and Catalysis. 2023. V.64. N6. P.837–848. DOI: 10.1134/S0023158423060046 WOS Scopus РИНЦ CAPlusCA OpenAlex
Variation of the Catalytic Activity and Selectivity of Cobalt in Ethylene Oxidation during Stepwise Oxidation of the Cobalt Surface
Kinetics and Catalysis. 2023. V.64. N6. P.837–848. DOI: 10.1134/S0023158423060046 WOS Scopus РИНЦ CAPlusCA OpenAlex
Оригинальная версия:
Бычков В.Ю.
, Тюленин Ю.П.
, Гулин А.А.
, Корчак В.Н.
Изменение каталитической активности и селективности кобальта в окислении этилена при ступенчатом окислении его поверхности
Кинетика и катализ. 2023. Т.64. №6. С.785-797. DOI: 10.31857/S0453881123060047 РИНЦ OpenAlex
Изменение каталитической активности и селективности кобальта в окислении этилена при ступенчатом окислении его поверхности
Кинетика и катализ. 2023. Т.64. №6. С.785-797. DOI: 10.31857/S0453881123060047 РИНЦ OpenAlex
Даты:
| Поступила в редакцию: | 1 февр. 2023 г. |
| Принята к публикации: | 19 апр. 2023 г. |
| Опубликована online: | 12 дек. 2023 г. |
Идентификаторы БД:
| Web of science: | WOS:001122621800022 |
| Scopus: | 2-s2.0-85179348671 |
| РИНЦ: | 64493243 |
| Chemical Abstracts: | 2023:2603188 |
| Chemical Abstracts (print): | 185:210358 |
| OpenAlex: | W4389625680 |