The Effect of Co and Ir on the Activity of the K2[Fe2(CO)8]- and K2[Ru4(CO)13]-Based Systems in Ammonia Synthesis.: The Synergistic Acceleration of the Ammonia Synthesis over the K2[Fe2(CO)8]+K Catalysts by Iridium Научная публикация
| Журнал |
Journal of Molecular Catalysis A: Chemical
ISSN: 1381-1169 |
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| Вых. Данные | Год: 2001, Том: 165, Номер: 1-2, Страницы: 141-147 Страниц : 7 DOI: 10.1016/S1381-1169(00)00379-4 | ||||
| Ключевые слова | Ammonia synthesis, Anionic iron and ruthenium carbonyl clusters, Cobalt, Iridium, Supported catalysts, Synergism | ||||
| Авторы |
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| Организации |
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Информация о финансировании (1)
| 1 | Российский фонд фундаментальных исследований | 99-03-32396 |
Реферат:
The effect of Co and Ir on the ammonia synthesis over the K2[Fe2(CO)8]+K and K2[Ru4(CO)13]+K catalysts on graphite-like active carbon “Sibunit” has been investigated. The catalysts were prepared by depositing K2[Fe2(CO)8] and K2[Ru4(CO)13] onto the “Sibunit” carbon-supported Co and Ir, followed by thermal decomposition of the deposited cluster and treatment of the resulting sample with metallic potassium. The catalysts containing no potassium metal have been studied as well. It has been found that the presence of Co in the Ru catalysts substantially decreases the ammonia synthesis rate. Similar results have been obtained on testing the Ru–Ir samples. By contrast, the introduction of Ir in the K2[Fe2(CO)8]+K catalysts leads to a synergistic acceleration of the process of the ammonia synthesis. The strongest accelerating effect of Ir is observed at 200°C. A rise in the reaction temperature to 250, 300 and then to 350°C results in a gradual weakening of the Fe–Ir synergism. An important feature of the Fe–Ir catalysts found is their increased activity in the ammonia synthesis at 150°C. The presence of Co in the iron catalysts little affects, in general, the ammonia synthesis rate, although some acceleration of this process by Co at 350 and 400°C for the samples not treated with potassium metal can be noted.
Библиографическая ссылка:
Yunusov S.M.
, Kalyuzhnaya E.S.
, Moroz B.L.
, Agafonova S.N.
, Likholobov V.A.
, Shur V.B.
The Effect of Co and Ir on the Activity of the K2[Fe2(CO)8]- and K2[Ru4(CO)13]-Based Systems in Ammonia Synthesis.: The Synergistic Acceleration of the Ammonia Synthesis over the K2[Fe2(CO)8]+K Catalysts by Iridium
Journal of Molecular Catalysis A: Chemical. 2001. V.165. N1-2. P.141-147. DOI: 10.1016/S1381-1169(00)00379-4 WOS Scopus РИНЦ CAPlusCA OpenAlex
The Effect of Co and Ir on the Activity of the K2[Fe2(CO)8]- and K2[Ru4(CO)13]-Based Systems in Ammonia Synthesis.: The Synergistic Acceleration of the Ammonia Synthesis over the K2[Fe2(CO)8]+K Catalysts by Iridium
Journal of Molecular Catalysis A: Chemical. 2001. V.165. N1-2. P.141-147. DOI: 10.1016/S1381-1169(00)00379-4 WOS Scopus РИНЦ CAPlusCA OpenAlex
Даты:
| Поступила в редакцию: | 2 февр. 2000 г. |
| Принята к публикации: | 17 июл. 2000 г. |
| Опубликована online: | 26 дек. 2000 г. |
| Опубликована в печати: | 8 янв. 2001 г. |
Идентификаторы БД:
| Web of science: | WOS:000166375300019 |
| Scopus: | 2-s2.0-0035825307 |
| РИНЦ: | 13381222 |
| Chemical Abstracts: | 2001:107147 |
| Chemical Abstracts (print): | 134:213269 |
| OpenAlex: | W1501295953 |