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Effects of lateral interactions in multicomponent adsorption

✍ Scribed by Per Arne Rikvold

Publisher
Elsevier Science
Year
1991
Tongue
English
Weight
508 KB
Volume
36
Category
Article
ISSN
0013-4686

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✦ Synopsis

Effects

induced by lateral adsorbateadsorbate interactions were studied in a three-state lattice-gas model of two-component adsorption. For different values of the interactions one may observe either poisoning behavior or enhanced adsorption. These behaviors are closely related to the topologies of the adsorbate phase diagrams. Based on this understanding, quantitative criteria are given, which predict the interactions for which poisoning or enhanced adsorption occurs. Adsorption isotherms were obtained from numerical transfer-matrix and Monte Carlo calculations. Results are presented for the poisoning by S of H on Pt(ll1) and, as examples of enhanced adsorption, the electrosorption of naphthalene on Cu and n-decylamine on Ni. The agreement with experimental adsorption isotherms is good.

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