Abstract

An Auger electron spectroscopy (AES) study of clean and CO exposed surfaces of Al(111) has been performed. The main conclusions are: On a virtually defect free crystal surface CO adsorbs associatively for temperature ranging from RT down to close to LN2 temperature. This associatively adsorbed phase cannot be observed in AES. Only upon electron beam stimulation the molecular adsorbed CO can dissociate and chemisorb strongly. For high doses of CO and electron beam bomdardment, the surface becomes progressively carbon richer.

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