Sulphide Catalysts on Silica as a Support. V. EXAFS Study of the Nearest Environment of Tungsten and Nickel in W/SiO2 and Ni,W/SiO2 Catalysts Научная публикация
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Applied Catalysis
ISSN: 0166-9834 |
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| Вых. Данные | Год: 1985, Том: 14, Номер: 1-3, Страницы: 1-14 Страниц : 14 DOI: 10.1016/S0166-9834(00)84339-0 | ||
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Реферат:
Analysis of the extended X-ray absorption fine structure (EXAFS) of W LIII edge showed that in sulphided W/SiO2 and Ni,W/Si02 catalysts, the distances W-S and W-W are the same as in bulk WS2. Part of the W ions contain oxygen atoms in the nearest environment resulting presumably from anchoring of sulphided particles to the oxygen of the support surface. In W/SiO2 catalysts, W atoms are surrounded by fewer neighbouring S and W atoms than in bulk WS2. For Ni,W/SiOp catalysts, an increase of the number of neighbouring atoms in the W coordination shell was observed. This
phenomenon is explained by the formation of mixed sulphided particles with localization of Ni on the side planes of WS2 slabs. Data on EXAFS of the Ni K absorption edge showed that in bimetallic sulphide catalysts, Ni atoms contain S atoms as nearest neighbours at a distance of ~ 2.2 A.
Библиографическая ссылка:
Kochubei D.I.
, Kozlov M.A.
, Zamaraev K.I.
, Burmistrov V.A.
, Startsev A.N.
, Yermakov Y.I.
Sulphide Catalysts on Silica as a Support. V. EXAFS Study of the Nearest Environment of Tungsten and Nickel in W/SiO2 and Ni,W/SiO2 Catalysts
Applied Catalysis. 1985. V.14. N1-3. P.1-14. DOI: 10.1016/S0166-9834(00)84339-0 WOS Scopus РИНЦ CAPlusCA OpenAlex Sciact
Sulphide Catalysts on Silica as a Support. V. EXAFS Study of the Nearest Environment of Tungsten and Nickel in W/SiO2 and Ni,W/SiO2 Catalysts
Applied Catalysis. 1985. V.14. N1-3. P.1-14. DOI: 10.1016/S0166-9834(00)84339-0 WOS Scopus РИНЦ CAPlusCA OpenAlex Sciact
Даты:
| Поступила в редакцию: | 5 июл. 1983 г. |
| Принята к публикации: | 4 окт. 1984 г. |
| Опубликована в печати: | 1 янв. 1985 г. |
| Опубликована online: | 2 окт. 2001 г. |
Идентификаторы БД:
| Web of science: | WOS:A1985ACZ5900001 |
| Scopus: | 2-s2.0-0022013039 |
| РИНЦ: | 22617546 |
| Chemical Abstracts: | 1985:155478 |
| Chemical Abstracts (print): | 102:155478 |
| OpenAlex: | W1508683163 |
| Sciact: | 12295 |