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)