Electronic Interactions in Bimetallic Systems: An X-ray Photoelectron Spectroscopic Study
نویسنده
چکیده
The electronic interactions in Cu/Rh( loo), Cu/Ru(OOOI), Ni/Ru(0001), Ni/W( 1 lo), and Pd/W( 1 IO) have been examined by means of X-ray photoelectron spectroscopy (XPS). The shifts in core-level binding energies indicate that the adatoms in a monolayer of Ni, Cu, or Pd are electronically perturbed with respect to the surface atoms of Ni(100), Cu( IOO), or Pd(100). The magnitude of the electronic perturbations is larger for Pd/W(l IO) and Cu/Rh( 100). The present results show a correlation between the shifts in the XPS surface core-level binding energies and the variations i n the desorption temperature of CO from metal adlayers.
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