Abstract
On a “real surface” adsorption and desorption are frequently completely controlled by surface defects. In a model case the influence of steps, point defects and foreign atoms on the adsorption of H2/Ni is investigated. An analysis of the temperature dependence and the angular variation of the sticking coefficient allows the description of the physics of adsorption near defects. In some instances rather small defect concentrations lead to pronounced changes in the adsorption, including isotope effects.
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