Abstract
Adsorption of carbon monoxide on Pt (335) and (112) stepped surfaces has been investigated by the extended LEPS (London-Eryring-Polanyi-Sato) method which is constructed by the 5-parameter Morse Potential. The calculated results show there have common characteristics of CO adsorption on the two surfaces. On both Pt (335) and (112) stepped surfaces, CO molecules adsorb on the step top site initially. With the coverage increasing, CO molecules diffuse from the step top sites to the stable terrace bridge sites and the terrace top sites sequentially. However, the step bridge site only corresponds to a transition state on the two surfaces. The predictions for vibrational frequency are in good agreement with the experimental results.
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