Effect of Initial Nickel and Iron Oxide Morphology on Their Structural Transformation in CO/H2 Mixture Научная публикация
Конференция |
Catalysis and photocatalysis on metal oxides: ACS summer meeting 21-25 авг. 1995 , Chicago |
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Журнал |
Catalysis Today
ISSN: 0920-5861 , E-ISSN: 1873-4308 |
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Вых. Данные | Год: 1997, Том: 33, Номер: 1-3, Страницы: 323-334 Страниц : 12 DOI: 10.1016/S0920-5861(96)00105-8 | ||||
Ключевые слова | CO hydrogenation, In situ X-ray diffraction, Iron oxides, Nickel oxides, Solid-gas reaction, Solid-phase transformation, Transmission electron microscopy | ||||
Авторы |
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Организации |
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Реферат:
The NiO and α-Fe2O3 samples from various backgrounds were used as precursors of the catalysts for CO hydrogenation. The effect of the initial microstructure of oxides on the morphological peculiarities and catalytic properties of the newly formed catalysts was studied using transmission electron microscopy and in situ XRD combined on-line with gas-chromatographic analysis. The initial morphology of precursors is found to be responsible for the direction and regularity of the solid-gas reactions yielding the catalyst, as well as for the ‘architecture’ and activity of the catalysts obtained: (i) NiO with the best developed plane (111) transforms into Ni3C/NiO catalyst consisting of platelet oxide particle covered by Ni3C microcrystals and producing the equal amounts of CH4 and CO2; disordering of the plane (111) induced by SD + HP leads to the formation of Ni/Ni3C/NiO catalyst consisting of the polycrystalline phases, whose catalytic properties improved; (ii) NiO with the best developed plane (100) transforms into Ni/Ni3C/NiO catalyst containing NiO microcrystals covered by Ni(100) and polycrystalline Ni3C and giving CH4 as a major product of reaction; action of SD + HP results in the formation of Ni/Ni3C/NiO catalyst containing polycrystalline Ni and Ni3C phases, whose catalytic properties degraded. Similar correlation is observed for the catalysts prepared from α-Fe2O3.
Библиографическая ссылка:
Morozova O.S.
, Krylov O.V.
, Kryukova G.N.
, Plyasova L.M.
Effect of Initial Nickel and Iron Oxide Morphology on Their Structural Transformation in CO/H2 Mixture
Catalysis Today. 1997. V.33. N1-3. P.323-334. DOI: 10.1016/S0920-5861(96)00105-8 WOS Scopus РИНЦ
Effect of Initial Nickel and Iron Oxide Morphology on Their Structural Transformation in CO/H2 Mixture
Catalysis Today. 1997. V.33. N1-3. P.323-334. DOI: 10.1016/S0920-5861(96)00105-8 WOS Scopus РИНЦ
Даты:
Опубликована в печати: | 17 янв. 1997 г. |
Опубликована online: | 26 мар. 1998 г. |
Идентификаторы БД:
Web of science | WOS:A1997WF26200030 |
Scopus | 2-s2.0-0040560863 |
РИНЦ | 13275340 |
Chemical Abstracts | 1996:752659 |
Chemical Abstracts (print) | 126:105708 |
OpenAlex | W1974606052 |