Collect. Czech. Chem. Commun. 1991, 56, 42-59

Effects of Langmuirian adsorption on the potentiostatic response at spherical and planar electrodes

María-Luisa Alcaraz and Jesús Gálvez*

Laboratory of Physical Chemistry, Faculty of Science, 30100 Murcia, Spain


Equations for a potentiostatic reaction with an adsorption process following Langmuir’s isotherm have been derived for the expanding sphere with any power law electrode model. This model is very general and includes, among others, the following ones: (a) stationary plane; (b) stationary sphere; (c) expanding plane; and (d) expanding sphere. Characteristics of these solutions and the behavior of the corresponding asymptotic solutions are discussed. A comparison of the results obtained for plane and spherical electrodes has also been performed.