The Possible Role of Intermediate NH Species in Oscillations of the NO+H2 Reaction on Noble Metal Surfaces Full article
| Journal |
Surface Science
ISSN: 0039-6028 |
||||
|---|---|---|---|---|---|
| Output data | Year: 2004, Volume: 573, Number: 2, Pages: 264-271 Pages count : 8 DOI: 10.1016/j.susc.2004.09.038 | ||||
| Tags | Catalysis, Low index single crystal surfaces, Models of non-linear phenomena, Semi-empirical models and model calculations, Surface chemical reaction | ||||
| Authors |
|
||||
| Affiliations |
|
Funding (2)
| 1 | Netherlands Organisation for Scientific Research | 047.015.002 |
| 2 | Russian Foundation for Basic Research | 04-03-33191 |
Abstract:
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.
Cite:
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 ANCAN 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 ANCAN OpenAlex
Dates:
| Submitted: | Jan 31, 2004 |
| Accepted: | Sep 28, 2004 |
| Published online: | Oct 13, 2004 |
| Published print: | Dec 1, 2004 |
Identifiers:
| Web of science: | WOS:000225612600014 |
| Scopus: | 2-s2.0-10044245140 |
| Elibrary: | 13448503 |
| Chemical Abstracts: | 2004:1023340 |
| Chemical Abstracts (print): | 142:163209 |
| OpenAlex: | W2066506633 |