Catalytic Combustion of Methane on Ferrites Научная публикация
| Конференция |
10th International Symposium on the Scientific Bases for the Preparation of Heterogeneous Catalysts 11-15 июл. 2010 , Louvain-la-Neuve |
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| Сборник | Scientific Bases for the Preparation of Heterogeneous Catalysts : Proceedings of the 10th International Symposium, Louvain-la-Neuve, Belgium, July 11-15, 2010 Сборник, Elsevier. Amsterdam, The Netherlands.2010. 857 c. ISBN 9780444536013. |
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| Журнал |
Studies in Surface Science and Catalysis
ISSN: 0167-2991 |
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| Вых. Данные | Год: 2010, Том: 175, Страницы: 355-359 Страниц : 5 DOI: 10.1016/S0167-2991(10)75059-X | ||
| Ключевые слова | Ferrite, Methane, Oxidation, Properties, Synthesis | ||
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| Организации |
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Реферат:
Sr–hexaferrites prepared by co-precipitation method and calcined at 700–1000 °С have been characterized by thermogravimetric and differential thermal analysis (TG–DTA), Fourier transformed infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), hydrogen temperature-programmed reduction (H2-TPR), and Ar adsorption techniques. It has been shown that hexaferrite phase formed after calcination at 700 °С is amorphous and its crystallization occurs at 800 °С. Specific surface area (SBET) of the samples calcined at 700 °С is 30–60 m2/g. Reduction in hydrogen proceeds in several steps, Fe(III) in the hexaferrite structure being practically reduced to Fe0. Amount of hydrogen necessary for the reduction of the samples decrease in the order: SrMn2Fe10O19 > SrFe12O19 > SrMn6Fe6O19 > SrMn2Al10O19. Surface composition of the ferrites differs from bulk. According to XPS data, the surface is enriched with strontium. Sr segregation is most probably explained by the formation of surface carbonates and hydroxocarbonates. The main components on the surface are in oxidized states: Mn3+ and Fe3+. Maximum activity in the methane oxidation is achieved for the SrMnxFe12−xO19 (0 ⩽ x ⩽ 2) catalysts. These samples are characterized by highest amount of the hexaferrite phase, which promotes change of oxidation state Mn(Fe)3+ ↔ Mn(Fe)2+.
Библиографическая ссылка:
Bukhtiyarova M.V.
, Ivanova A.S.
, Slavinskaya E.M.
, Plyasova L.M.
, Rogov V.A.
, Kaichev V.V.
Catalytic Combustion of Methane on Ferrites
В сборнике Scientific Bases for the Preparation of Heterogeneous Catalysts : Proceedings of the 10th International Symposium, Louvain-la-Neuve, Belgium, July 11-15, 2010. – Elsevier., 2010. – C.355-359. – ISBN 9780444536013. DOI: 10.1016/S0167-2991(10)75059-X WOS Scopus РИНЦ CAPlusCA OpenAlex
Catalytic Combustion of Methane on Ferrites
В сборнике Scientific Bases for the Preparation of Heterogeneous Catalysts : Proceedings of the 10th International Symposium, Louvain-la-Neuve, Belgium, July 11-15, 2010. – Elsevier., 2010. – C.355-359. – ISBN 9780444536013. DOI: 10.1016/S0167-2991(10)75059-X WOS Scopus РИНЦ CAPlusCA OpenAlex
Даты:
| Опубликована в печати: | 1 янв. 2010 г. |
| Опубликована online: | 8 июл. 2010 г. |
Идентификаторы БД:
| Web of science: | WOS:000291935400059 |
| Scopus: | 2-s2.0-78649367280 |
| РИНЦ: | 16679014 |
| Chemical Abstracts: | 2010:1318450 |
| Chemical Abstracts (print): | 154:339319 |
| OpenAlex: | W1545205972 |