Authors: Luis PadillaCampos Patricio Fuentealba
Publish Date: 2003/11/25
Volume: 110, Issue: 6, Pages: 414-420
Abstract
We performed a theoretical study of the adsorption of oxygen on a cluster model of the Cu100 surface and also the surface coadsorbed with lithium and potassium atoms The study showed that alkali coadsorption facilitates in a significant way the process of molecular adsorption whereas the adsorption of atomic oxygen is only slightly modified The alkali atoms on the copper surface produce an increase in the charge transfer toward the oxygen molecule favoring the oxygen dissociation The effect is greater for the potassium coadsorption In addition we found that the potassium coadsorption favored the dissociation and recombination processes by about 60 and 15 respectively In turn the lithium coadsorption favored only the recombination process by about 50 These results could be an important aspect for catalytic processes
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