Desorption and Catalytic Properties of Palladium, Supported on Al2O3-La2O3, Prepared by the Sol-Gel Method Научная публикация
Журнал |
Catalysis Letters
ISSN: 1011-372X , E-ISSN: 1572-879X |
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Вых. Данные | Год: 1997, Том: 47, Номер: 1, Страницы: 27-34 Страниц : 8 DOI: 10.1023/A:1019055626748 | ||||||||
Ключевые слова | Hydrogen spillover, NO reduction, Pd/Al2O3-La2O3 catalysts, Sol-gel preparation method | ||||||||
Авторы |
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Организации |
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Информация о финансировании (1)
1 | National Council of Science and Technology | 0520-E9108 |
Реферат:
Desorption and catalytic properties of 0.3 wt% Pd catalysts supported on alumina-lanthana, prepared by the sol-gel method, were studied. A large excess of consumed hydrogen was observed during TPR experiments on these catalysts due to the partial reduction of lanthana. The enhanced hydrogen adsorption (H/Pd varies from 8 to 15) detected by TPD for these catalysts is supposed to be a consequence of spillover. Spillover of hydrogen is favored by a high dispersion of palladium on the support surface and the presence of lanthana reduced species. Palladium on alumina-lanthana catalysts show a higher catalytic activity than palladium on alumina catalysts because reduced species of lanthana stabilize palladium particles. Similarity of ammonia selectivity at high temperatures allows one to suggest that reduced lanthana is involved in the reaction on pure alumina-lanthana support and palladium on alumina-lanthana catalysts at these temperatures. A synergetic effect between small palladium particles and reduced species of lanthana is suggested to be responsible for observed behavior of the lanthana-promoted palladium catalysts.
Библиографическая ссылка:
Fuentes S.
, Bogdanchikova N.E.
, Diaz G.
, Peraaza M.
, Sandoval G.C.
Desorption and Catalytic Properties of Palladium, Supported on Al2O3-La2O3, Prepared by the Sol-Gel Method
Catalysis Letters. 1997. V.47. N1. P.27-34. DOI: 10.1023/A:1019055626748 WOS Scopus РИНЦ
Desorption and Catalytic Properties of Palladium, Supported on Al2O3-La2O3, Prepared by the Sol-Gel Method
Catalysis Letters. 1997. V.47. N1. P.27-34. DOI: 10.1023/A:1019055626748 WOS Scopus РИНЦ
Даты:
Поступила в редакцию: | 26 февр. 1997 г. |
Принята к публикации: | 21 мая 1997 г. |
Опубликована online: | 1 июл. 2006 г. |
Опубликована в печати: | 1 авг. 2018 г. |
Идентификаторы БД:
Web of science | WOS:A1997XV65400005 |
Scopus | 2-s2.0-0002316146 |
РИНЦ | 13265445 |
Chemical Abstracts | 1997:594125 |
Chemical Abstracts (print) | 127:267192 |
OpenAlex | W90828200 |