On the impedance of galvanic cells XXVI. Application of the complex plane method in the case of mixed currents

Abstract

The applicability of the complex plane method for the evaluation of the impedance parameters in the case of two simultaneously proceeding electrode reactions is discussed. It is shown that the possibility of the evaluation depends strongly on the values of the irreversibility quotients of both reactions and on the frequency range in which the measurements are performed. The theory is applied to impedance measurements with the dropping mercury electrode in azeotropic HI, in which case a mixed current appears.