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Coadsorption and reaction of sulfur and silver on a Ru(001) surface

Authors
Journal
Surface Science
0039-6028
Publisher
Elsevier
Publication Date
Volume
356
Identifiers
DOI: 10.1016/0039-6028(96)00674-7
Keywords
  • Compound Formation
  • Ruthenium
  • Silver
  • Soft X-Ray Photoelectron Spectroscopy
  • Sulfides
  • Sulfur

Abstract

Abstract We have investigated the interaction of Ag and S coadsorbed on a Ru(001) surface using high-resolution soft X-ray photoemission spectroscopy of the S 2p core level and valence region. The interaction of adsorbed sulfur and the first layer of Ag adatoms is weak. At ΘS + ΘAg < 0.5 ML, Ag and S are coadsorbed in segregated domains. The Ag layer is covered by chemisorbed S only after a S-saturation of the Ru surface (ΘS > 0.5 ML). At Ag coverages higher than one monolayer, the valence band and the S 2p spectra show formation of Silver sulfide at room temperature.

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