Details
| Originalsprache | Englisch |
|---|---|
| Seiten (von - bis) | 131-144 |
| Seitenumfang | 14 |
| Fachzeitschrift | Surface science |
| Jahrgang | 576 |
| Ausgabenummer | 1-3 |
| Frühes Online-Datum | 24 Dez. 2004 |
| Publikationsstatus | Veröffentlicht - 10 Feb. 2005 |
Abstract
A mean field model is presented describing the kinetics of ammonia oxidation with oxygen on two stepped Pt(1 1 1) surfaces, Pt(5 3 3) and Pt(4 4 3), under low pressure conditions (p < 10-3 mbar). It is shown that the experimental data of both surfaces can be simulated with good agreement with a strongly simplified mechanism which neglects NHx (x = 1, 2) intermediates and contains direct H abstraction from NH3 by adsorbed oxygen as essential step. The model works quantitatively in excess of oxygen, but with ammonia being in excess the agreement worsens.
ASJC Scopus Sachgebiete
- Physik und Astronomie (insg.)
- Physik der kondensierten Materie
- Physik und Astronomie (insg.)
- Oberflächen und Grenzflächen
- Werkstoffwissenschaften (insg.)
- Oberflächen, Beschichtungen und Folien
- Werkstoffwissenschaften (insg.)
- Werkstoffchemie
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in: Surface science, Jahrgang 576, Nr. 1-3, 10.02.2005, S. 131-144.
Publikation: Beitrag in Fachzeitschrift › Artikel › Forschung › Peer-Review
}
TY - JOUR
T1 - Kinetics of ammonia oxidation on stepped platinum surfaces
T2 - II. Simulation results
AU - Scheibe, A.
AU - Hinz, M.
AU - Imbihl, R.
N1 - Funding Information: This work was supported by the DFG under the priority program 1091 “Bridging the gap between ideal and real systems in heterogeneous catalysis”.
PY - 2005/2/10
Y1 - 2005/2/10
N2 - A mean field model is presented describing the kinetics of ammonia oxidation with oxygen on two stepped Pt(1 1 1) surfaces, Pt(5 3 3) and Pt(4 4 3), under low pressure conditions (p < 10-3 mbar). It is shown that the experimental data of both surfaces can be simulated with good agreement with a strongly simplified mechanism which neglects NHx (x = 1, 2) intermediates and contains direct H abstraction from NH3 by adsorbed oxygen as essential step. The model works quantitatively in excess of oxygen, but with ammonia being in excess the agreement worsens.
AB - A mean field model is presented describing the kinetics of ammonia oxidation with oxygen on two stepped Pt(1 1 1) surfaces, Pt(5 3 3) and Pt(4 4 3), under low pressure conditions (p < 10-3 mbar). It is shown that the experimental data of both surfaces can be simulated with good agreement with a strongly simplified mechanism which neglects NHx (x = 1, 2) intermediates and contains direct H abstraction from NH3 by adsorbed oxygen as essential step. The model works quantitatively in excess of oxygen, but with ammonia being in excess the agreement worsens.
KW - Ammonia oxidation
KW - Platinum
KW - Simulation
KW - Stepped surfaces
UR - http://www.scopus.com/inward/record.url?scp=12444285823&partnerID=8YFLogxK
U2 - 10.1016/j.susc.2004.12.007
DO - 10.1016/j.susc.2004.12.007
M3 - Article
AN - SCOPUS:12444285823
VL - 576
SP - 131
EP - 144
JO - Surface science
JF - Surface science
SN - 0039-6028
IS - 1-3
ER -