Metastable impact electron emission microscopy of the catalytic H2 oxidation on Rh( 1 1 0 )

G. Lilienkamp, Han Wei, W. Maus-Friedrichs, V. Kempter, H. Marbach, S. Günther, Y. Suchorski

Research output: Contribution to journalConference articlepeer-review

8 Scopus citations

Abstract

Laterally resolved metastable impact electron spectroscopy is based on the energy analysis of electrons originating from collisions of metastable He* (23S) atoms with the surface, and can be used for probing the spatial distribution of surface species, i.e. for chemically resolved surface microscopy (MIEEM = metastableimpactelectronemissionmicroscopy). We report upon first MIEEM results on the spectroscopic imaging of the catalytic H2 oxidation on the clean and potassium-precovered Rh(1 1 0) surface, in which the spatio-temporal distribution of the reactants on the surface, the reaction fronts as well as the redistribution of the initially spatially homogeneous K coverage have been monitored. The results are in agreement with data previously obtained by scanning photoelectron microscopy and are discussed in terms of self-organization in the diffusion zone.

Original languageEnglish
Pages (from-to)132-136
Number of pages5
JournalSurface Science
Volume532-535
DOIs
StatePublished - 10 Jun 2003
Externally publishedYes
EventProceedings of the 7th International Conference on Nanometer - Malmo, Sweden
Duration: 29 Aug 200231 Aug 2002

Keywords

  • Alkali metals
  • Metastable induced electron spectroscopy (MIES)
  • Surface chemical reaction

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