The Influence of Support on the Low-Temperature Activity of Pd in the Reaction of CO Oxidation: 3. Kinetics and Mechanism of the Reaction Научная публикация
| Журнал |
Journal of Catalysis
ISSN: 0021-9517 , E-ISSN: 1090-2694 |
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| Вых. Данные | Год: 1996, Том: 161, Номер: 2, Страницы: 517-523 Страниц : 7 DOI: 10.1006/jcat.1996.0213 | ||
| Ключевые слова | CARBON-MONOXIDE; CATALYTIC-OXIDATION; PALLADIUM; ADSORPTION; TRANSIENT; PARTICLES | ||
| Авторы |
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| Организации |
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Реферат:
The unsteady and steady-state kinetics of low-temperature CO oxidation over Pd supported on TiO2, SiO2, and Al2O3were investigated by using pulse/flow microcatalytic installation.In situFourier-transformed IR spectroscopy was used to monitor Pd surface under reaction conditions. The kinetic parameters were found to differ considerably from those typical for the high-temperature region. Room-temperature CO oxidation was demonstrated to be structure-sensitive and to proceed via interaction between weakly bound CO and oxygen located at defect centers. Analysis by a semiempirical interacting bonds method showed weakly bound forms of CO to appear due to cooperative Pd–Pd bond rearrangement induced by CO adsorption/desorption processes, while oxygen incorporation into the subsurface layer hinders this reconstruction, thus strengthening Pd–CO bond. In the range of 298–373 K, transition to a mechanism of the usual Langmuir–Hinshelwood type occurs, affecting observed kinetic features of the reaction.
Библиографическая ссылка:
Pavlova S.N.
, Sadykov V.A.
, Bulgakov N.N.
, Bredikhin M.N.
The Influence of Support on the Low-Temperature Activity of Pd in the Reaction of CO Oxidation: 3. Kinetics and Mechanism of the Reaction
Journal of Catalysis. 1996. V.161. N2. P.517-523. DOI: 10.1006/jcat.1996.0213 WOS Scopus РИНЦ CAPlusCA OpenAlex
The Influence of Support on the Low-Temperature Activity of Pd in the Reaction of CO Oxidation: 3. Kinetics and Mechanism of the Reaction
Journal of Catalysis. 1996. V.161. N2. P.517-523. DOI: 10.1006/jcat.1996.0213 WOS Scopus РИНЦ CAPlusCA OpenAlex
Даты:
| Поступила в редакцию: | 21 сент. 1994 г. |
| Принята к публикации: | 24 янв. 1996 г. |
| Опубликована в печати: | 1 июл. 1996 г. |
| Опубликована online: | 25 мая 2002 г. |
Идентификаторы БД:
| Web of science: | WOS:A1996VC88000004 |
| Scopus: | 2-s2.0-0001140042 |
| РИНЦ: | 13239722 |
| Chemical Abstracts: | 1996:504565 |
| Chemical Abstracts (print): | 125:149714 |
| OpenAlex: | W2181961489 |