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On the adsorption of uridine at the Ag(111)/aqueous solution interface

par Van Krieken, Michel ;Buess Herman, Claudine
Référence Electrochimica acta, 45, page (675-683)
Publication Publié, 1999

Article révisé par les pairs

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Résumé :

The adsorption of uridine at an Ag(111) single-crystal electrode has been investigated by means of cyclic voltammetry and of double-layer capacitance versus potential measurements. Up to four different interfacial regions may be distinguished. One of these regions can be assigned to a well-organized physisorbed monolayer and another one, detected at more positive potentials, may be associated with a chemisorbed layer. The kinetics of the interfacial rearrangements were investigated by recording current-time curves. When single potential steps are applied starting from the chemisorbed layer, the transients are predominantly associated with the dissolution of the initial layer. Those transients have been analyzed in terms of a model which combines a Langmuir-type desorption step and a dissolution which proceeds from holes growing with a time-dependent rate.