Homomolecular and Isotopic Exchange of Oxygen on Lanthanum Oxide Научная публикация
Журнал |
Kinetics and Catalysis
ISSN: 0023-1584 , E-ISSN: 1608-3210 |
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Вых. Данные | Год: 1968, Том: 9, Номер: 1, Страницы: 106-110 Страниц : 5 | ||
Авторы |
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Организации |
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Реферат:
Investigation of kinetic heteroexchange showed that one part of the O in the oxide lattice (less than one monolayer) is exchanged very quickly, and then the rate of heteroexchange lessens, although the activation energy remains practically const. The sudden decrease of the rate indicates that surface layer of O is essentially heterogeneous in the presence of an exchange, where one O mol. is exchanged for two atoms on the oxide surface. Investigation of the homomol. exchange reaction of La2O3 and Gd2O3 reveals that the homomol. exchange rate varies irregularly with the temp., but the field of this anomaly is not the same. At low temp. the order of reaction is 0.75-1.4. At higher temp. the reaction is 1st order. There is no probability of O mol. dissocn. for so low a temp. The exchange in this case occurs between mol. forms of adsorbed O. The La2O3 and Gd2O3, previously treated in a vacuum at by 700° and cooled, are stable with regard to the O. The catalytic activity for La2O3 is lower than for Gd2O3. The treatment of the catalysts in a vacuum at high temps. creates catalysts with esp. active surfaces. This is related to one part of the O from the oxide surface being eliminated and anion vacancies being formed.
Библиографическая ссылка:
Sokolovskii V.D.
, Sazonov L.A.
, Boreskov G.K.
, Moskvina Z.V.
Homomolecular and Isotopic Exchange of Oxygen on Lanthanum Oxide
Kinetics and Catalysis. 1968. V.9. N1. P.106-110. РИНЦ
Homomolecular and Isotopic Exchange of Oxygen on Lanthanum Oxide
Kinetics and Catalysis. 1968. V.9. N1. P.106-110. РИНЦ
Оригинальная:
Соколовский В.Д.
, Сазонов Л.А.
, Боресков Г.К.
, Москвина З.В.
Гомомолекулярный и изотопный обмен кислорода на окиси лантана
Кинетика и катализ. 1968. Т.9. №1. С.130-134. РИНЦ
Гомомолекулярный и изотопный обмен кислорода на окиси лантана
Кинетика и катализ. 1968. Т.9. №1. С.130-134. РИНЦ
Идентификаторы БД:
РИНЦ | 46635229 |
Цитирование в БД:
БД | Цитирований |
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РИНЦ | 2 |