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Edvin Lundgren. Portrait.

Edvin Lundgren

Professor

Edvin Lundgren. Portrait.

Facile NOx interconversion over preoxidized Ag(111)

Author

  • S. Klacar
  • Natalia Martin
  • Johan Gustafson
  • Sara Blomberg
  • Z. Liu
  • S. Axnanda
  • R. Chang
  • Edvin Lundgren
  • H. Gronbeck

Summary, in English

X-ray photoelectron spectroscopy and density functional theory calculations are used to investigate NO adsorption at low (100 K) and room temperature (RT) over preoxidized Ag(111). At 100 K, the data indicates presence of NO and N2O2, with little or no nitrite/nitrate formation. This is consistent with the calculated surface core level shifts and the pronounced barrier for nitrite formation. At RT, the recorded spectra indicate a complex interconversion between adsorbed species with an initial formation of a p(4 x 4) nitrate overlayer. With increasing NO pressure, the experimental results are best rationalized by partial nitrate decomposition into nitrites and subsequent NO physisorption, which leads to the formation of N2O3-like species. (C) 2013 Elsevier B.V. All rights reserved.

Department/s

  • Synchrotron Radiation Research

Publishing year

2013

Language

English

Pages

167-174

Publication/Series

Surface Science

Volume

617

Document type

Journal article

Publisher

Elsevier

Topic

  • Atom and Molecular Physics and Optics

Keywords

  • Density functional theory
  • Photoemission spectroscopy
  • Ag
  • Silver
  • Nitrogen oxides

Status

Published

ISBN/ISSN/Other

  • ISSN: 0039-6028