On the impedance of galvanic cells XXVIII. The frequency-dependence of the electrode admittance for systems with first-order homogeneous chemical reactions and reactant adsorption occurring simultaneously

Abstract

Equations are derived for the interfacial admittance of an electrode at which the electrode reaction O+neR occurs assuming that the charge transfer is infinitely fast and that either O or R is involved in a first-order homogeneous reaction delivering the substance Y, or that both O and R are involved in a catalytic reaction. If, moreover, adsorption of O and R or Y at the electrode surface is assumed, rather, more complicated expressions are obtained. A number of simpler limiting cases are treated in more detail and it is concluded that in many practical cases the corresponding reduced equations describe the electrode admittance with sufficient precision