Details
| Original language | English |
|---|---|
| Pages (from-to) | 131-144 |
| Number of pages | 14 |
| Journal | Surface science |
| Volume | 576 |
| Issue number | 1-3 |
| Early online date | 24 Dec 2004 |
| Publication status | Published - 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.
Keywords
- Ammonia oxidation, Platinum, Simulation, Stepped surfaces
ASJC Scopus subject areas
- Physics and Astronomy(all)
- Condensed Matter Physics
- Physics and Astronomy(all)
- Surfaces and Interfaces
- Materials Science(all)
- Surfaces, Coatings and Films
- Materials Science(all)
- Materials Chemistry
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In: Surface science, Vol. 576, No. 1-3, 10.02.2005, p. 131-144.
Research output: Contribution to journal › Article › Research › 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 -