Abstract
The adsorption and decomposition of CO on Fe (100), Fe (110), Cu(111)–Fe, and Cu(110)–Fe surface alloys with different amounts of iron in the surface layers has been studied with ellipsometry. Only on Fe (100) at room temperature is CO found to dissociate rapidly. On all surfaces dissociation takes place, at higher temperatures, leaving equal amounts of C and O on the surface. On this adlayer reversible adsorption of CO takes place. The heats of adsorption have been determined from the observed isotherms. Heats of adsorption have also been determined for adlayers of only oxygen or carbon on the iron crystal faces.
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