Impedance at Polarized Platinum Electrodes in Various Electrolytes

The results of alternating current bridge measurements of the impedances of bright Pt in contact with 1N aqueous solutions of , , and KI as functions of polarizing voltage and alternating current frequency are presented. The data may be interpreted in a manner similar to that for experiments with acid solutions. Various factors are discussed which may determine the dependence of the impedance on frequency for the electric double layer at rough surfaces.