The formation of a NO-NH3 coadsorption complex on a Pt(111) surface
A NEXAFS study
- verfasst von
- F. Esch, Th Greber, S. Kennou, A. Siokou, S. Ladas, R. Imbihl
- 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.
- Organisationseinheit(en)
-
Institut für Physikalische Chemie und Elektrochemie
- Externe Organisation(en)
-
Fritz-Haber-Institut der Max-Planck-Gesellschaft
Universität Zürich (UZH)
University of Ioannina
University of Patras
- Typ
- Artikel
- Journal
- Catalysis letters
- Band
- 38
- Seiten
- 165-170
- Anzahl der Seiten
- 6
- ISSN
- 1011-372X
- Publikationsdatum
- 05.1996
- Publikationsstatus
- Veröffentlicht
- Peer-reviewed
- Ja
- ASJC Scopus Sachgebiete
- Katalyse, Allgemeine Chemie
- Elektronische Version(en)
-
https://doi.org/10.1007/BF00806563 (Zugang:
Geschlossen)