Details
| Original language | English |
|---|---|
| Pages (from-to) | 165-170 |
| Number of pages | 6 |
| Journal | Catalysis letters |
| Volume | 38 |
| Issue number | 3-4 |
| Publication status | Published - May 1996 |
Abstract
The adsorption of NO and the coadsorption of NO and NH3 on Pt(111) has been studied with TDS, work function measurements and near-edge X-ray absorption fine structure spectroscopy (NEXAFS). Pure NO was found to be adsorbed upright at low coverages (θNO < 0.25) with a bond length of 1.24 ± 0.05 Å which corresponds to an elongation by 0.1 Å as compared to the gas phase. An additional tilted species forms at high coverages. The formation of a coadsorption complex of NH3 and low coverage NO shows up in an elongation of NO to 1.28 ± 0.05 Å. In the coadsorption complex NO is adsorbed upright. The formation of such a complex which is held together by strong attractive interactions explains the high abundance of the mixed 14N15N reaction product in experiments with isotopically labeled educts in the NO + NH3 reaction.
Keywords
- Catalytic NO reduction, Coadsorption complexes, NEXAFS
ASJC Scopus subject areas
- Chemical Engineering(all)
- Catalysis
- Chemistry(all)
- General Chemistry
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In: Catalysis letters, Vol. 38, No. 3-4, 05.1996, p. 165-170.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - The formation of a NO-NH3 coadsorption complex on a Pt(111) surface
T2 - A NEXAFS study
AU - Esch, F.
AU - Greber, Th
AU - Kennou, S.
AU - Siokou, A.
AU - Ladas, S.
AU - Imbihl, R.
PY - 1996/5
Y1 - 1996/5
N2 - The adsorption of NO and the coadsorption of NO and NH3 on Pt(111) has been studied with TDS, work function measurements and near-edge X-ray absorption fine structure spectroscopy (NEXAFS). Pure NO was found to be adsorbed upright at low coverages (θNO < 0.25) with a bond length of 1.24 ± 0.05 Å which corresponds to an elongation by 0.1 Å as compared to the gas phase. An additional tilted species forms at high coverages. The formation of a coadsorption complex of NH3 and low coverage NO shows up in an elongation of NO to 1.28 ± 0.05 Å. In the coadsorption complex NO is adsorbed upright. The formation of such a complex which is held together by strong attractive interactions explains the high abundance of the mixed 14N15N reaction product in experiments with isotopically labeled educts in the NO + NH3 reaction.
AB - The adsorption of NO and the coadsorption of NO and NH3 on Pt(111) has been studied with TDS, work function measurements and near-edge X-ray absorption fine structure spectroscopy (NEXAFS). Pure NO was found to be adsorbed upright at low coverages (θNO < 0.25) with a bond length of 1.24 ± 0.05 Å which corresponds to an elongation by 0.1 Å as compared to the gas phase. An additional tilted species forms at high coverages. The formation of a coadsorption complex of NH3 and low coverage NO shows up in an elongation of NO to 1.28 ± 0.05 Å. In the coadsorption complex NO is adsorbed upright. The formation of such a complex which is held together by strong attractive interactions explains the high abundance of the mixed 14N15N reaction product in experiments with isotopically labeled educts in the NO + NH3 reaction.
KW - Catalytic NO reduction
KW - Coadsorption complexes
KW - NEXAFS
UR - http://www.scopus.com/inward/record.url?scp=0001499897&partnerID=8YFLogxK
U2 - 10.1007/BF00806563
DO - 10.1007/BF00806563
M3 - Article
AN - SCOPUS:0001499897
VL - 38
SP - 165
EP - 170
JO - Catalysis letters
JF - Catalysis letters
SN - 1011-372X
IS - 3-4
ER -