Spectroscopic link between adsorption site occupation and local surface chemical reactivity

A. Baraldi, S. Lizzit, G. Comelli, M. Kiskinova, R. Rosei, Johanna Karoliina Honkala, Jens Kehlet Nørskov

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Abstract

In this Letter we show that sequences of adsorbate-induced shifts of surface core level (SCL) x-ray photoelectron spectra contain profound information on surface changes of electronic structure and reactivity. Energy shifts and intensity changes of time-lapsed spectral components follow simple rules, from which adsorption sites are directly determined. Theoretical calculations rationalize the results for transition metal surfaces in terms of the energy shift of the d-band center of mass and this proves that adsorbate-induced SCL shifts provide a spectroscopic measure of local surface reactivity.
Original languageEnglish
JournalPhysical Review Letters
Volume93
Issue number4
Pages (from-to)046101
ISSN0031-9007
DOIs
Publication statusPublished - 2004

Bibliographical note

Copyright (2004) American Physical Society.

Keywords

  • ADSORBATE
  • METAL-SURFACES
  • KINETICS
  • LEVEL BINDING-ENERGY
  • CATALYSIS
  • RH(111)
  • PHOTOELECTRON-SPECTROSCOPY
  • CO
  • OXYGEN
  • RH(100)

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