Structural Influences on Adsorption Energy. III. CO on Cu(100)

Abstract

CO adsorption on Cu(100) has been found to be completely reversible over the temperature range 77–300°K and ${}_{p\mathrm{co}}{\text{=10}}^{\text{−8}}{\text{−10}}^{\text{−4}}$ torr using LEED and work function measurements. The isosteric heat has been determined as a function of coverage, and strong correlations have been found with surface structural changes. An in‐registry→out‐of‐registry transition was observed at 0.5 monolayer suggesting once again that localization on high coordination substrate sites may not be so important as commonly believed.