The Possible Role of Intermediate NH Species in Oscillations of the NO+H2 Reaction on Noble Metal Surfaces Научная публикация
| Журнал |
Surface Science
ISSN: 0039-6028 |
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| Вых. Данные | Год: 2004, Том: 573, Номер: 2, Страницы: 264-271 Страниц : 8 DOI: 10.1016/j.susc.2004.09.038 | ||||
| Ключевые слова | Catalysis, Low index single crystal surfaces, Models of non-linear phenomena, Semi-empirical models and model calculations, Surface chemical reaction | ||||
| Авторы |
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| Организации |
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Информация о финансировании (2)
| 1 | Netherlands Organisation for Scientific Research | 047.015.002 |
| 2 | Российский фонд фундаментальных исследований | 04-03-33191 |
Реферат:
A comparative study of the thermodynamic properties of adsorbed NHn species (n = 0, 1, 2, 3) on transition metal surfaces is performed by using the semi-empirical method of interacting bonds. The principal difference between single crystal surfaces exhibiting oscillatory behavior in the NO+H2 reaction, and those surfaces which do not show such a behavior is that the combination reaction of NH species can easily proceed in the former case, whereas it is substantially endothermic on the latter surfaces.
A trigger-like route for the oscillatory behavior is considered where the combination reaction of NH species operates as a temporary reaction pathway. This pathway practically does not contribute to the N2 formation until the nitrogen coverage reaches some critical value, which ensures a sufficiently close distance between adjacent NH particles. The trigger pathway starts upon reaching that stage initiating the surface wave propagation, and stops immediately when the wave propagation is completed. The surface becomes then nearly clean and ready for the next oscillatory cycle. In this way, the feedback mechanism and the critical point of the regular wave initiation can be understood without any further assumptions. An alternative key reaction is also considered.
Библиографическая ссылка:
Cholach A.R.
, Bulgakov N.N.
, Nieuwenhuys B.
The Possible Role of Intermediate NH Species in Oscillations of the NO+H2 Reaction on Noble Metal Surfaces
Surface Science. 2004. V.573. N2. P.264-271. DOI: 10.1016/j.susc.2004.09.038 WOS Scopus РИНЦ CAPlusCA OpenAlex
The Possible Role of Intermediate NH Species in Oscillations of the NO+H2 Reaction on Noble Metal Surfaces
Surface Science. 2004. V.573. N2. P.264-271. DOI: 10.1016/j.susc.2004.09.038 WOS Scopus РИНЦ CAPlusCA OpenAlex
Даты:
| Поступила в редакцию: | 31 янв. 2004 г. |
| Принята к публикации: | 28 сент. 2004 г. |
| Опубликована online: | 13 окт. 2004 г. |
| Опубликована в печати: | 1 дек. 2004 г. |
Идентификаторы БД:
| Web of science: | WOS:000225612600014 |
| Scopus: | 2-s2.0-10044245140 |
| РИНЦ: | 13448503 |
| Chemical Abstracts: | 2004:1023340 |
| Chemical Abstracts (print): | 142:163209 |
| OpenAlex: | W2066506633 |