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Surface segregation in alloys can be influenced by the presence of adsorbed species. In this work, the effect of adsorbed sulfur on surface segregation in a Pd 70 Cu 30 alloy was studied for sulfur coverages from zero through saturation and for temperatures from 400 to 1000K. X-ray photoemission spectroscopy (XPS) was used to determine the alloy composition in the near-surface region...
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