Adsorption of sulfur on heated $$(10\overline 1 0)$$ Re

High-resolution Auger electron spectroscopy is used to study the adsorption of sulfur on a $$(10\overline 1 0)$$ Re surface and to determine the regions of thermal stability of the resulting adsorption states. The formation of surface sulfide is observed and its stoichiometry, Re2S, and the absolute sulfur concentration on the rhenium surface N S =(6.0±1)×1014 atom/cm2 are determined. It is shown that the surface sulfide is destroyed by thermal desorption of sulfur from the rhenium surface and the desorption activation energy is estimated as E d =(3.3±0.2) eV for a coverage close to the surface sulfide and E d =(4.9±0.2) eV in the limit θ→0.

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