Effect of Anionic Admixtures on the Copper-Magnesium Mixed OxideReduction Научная публикация
| Журнал |
Reaction Kinetics, Mechanisms and Catalysis
ISSN: 1878-5190 , E-ISSN: 1878-5204 |
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| Вых. Данные | Год: 2010, Том: 101, Номер: 1, Страницы: 73-83 Страниц : 11 DOI: 10.1007/s11144-010-0211-1 | ||||
| Ключевые слова | Anionic admixture, Compensation effect, Copper-magnesium oxide, Diffusion, Isokinetic effect, Kinetics, Reduction, Thermal analysis | ||||
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Реферат:
The anionic composition, structural parameters, optical properties and reduction behavior of Cu–MgO solid solution in hydrogen dramatically change after exposure to air. The air-exposed Cu–Mg oxide contains a lot of CO3 2− and OH− anions. Its reduction proceeds via two stages: (1) diffusion of Cu2+ to the surface and (2) chemical interaction of Cu2+ with hydrogen. The effective activation energy gradually increases from that of the chemical step (65 kJ/mol) to that of the transport step of Cu2+ diffusion (130 kJ/mol). This behavior follows the “compensation effect”, which is close to those reported earlier for CuO reduction. On the contrary, reduction of Cu2+ from the Cu–Mg oxide sample, which was not exposed to air after thermal pretreatment in the inert gas, proceeds in one step at 120–160 °C with the effective activation energy of 19 kJ/mol, which is manifold less than the reported effective activation energies for various Cu-oxide systems. Water molecules eliminate from the sample slowly along with further heating up to 450 °C.
Библиографическая ссылка:
Khassin A.A.
, Filonenko G.A.
, Minyukova T.P.
, Molina I.Y.
, Plyasova L.M.
, Larina T.V.
, Anufrienko V.F.
Effect of Anionic Admixtures on the Copper-Magnesium Mixed OxideReduction
Reaction Kinetics, Mechanisms and Catalysis. 2010. V.101. N1. P.73-83. DOI: 10.1007/s11144-010-0211-1 WOS Scopus РИНЦ CAPlusCA OpenAlex
Effect of Anionic Admixtures on the Copper-Magnesium Mixed OxideReduction
Reaction Kinetics, Mechanisms and Catalysis. 2010. V.101. N1. P.73-83. DOI: 10.1007/s11144-010-0211-1 WOS Scopus РИНЦ CAPlusCA OpenAlex
Даты:
| Поступила в редакцию: | 24 мая 2010 г. |
| Принята к публикации: | 10 июн. 2010 г. |
| Опубликована online: | 25 июн. 2010 г. |
| Опубликована в печати: | 1 окт. 2010 г. |
Идентификаторы БД:
| Web of science: | WOS:000281111500007 |
| Scopus: | 2-s2.0-77955918296 |
| РИНЦ: | 18090944 |
| Chemical Abstracts: | 2010:1050946 |
| Chemical Abstracts (print): | 154:600327 |
| OpenAlex: | W2081802912 |