Application of nonlinear A.C. methods in the investigation of the electrical double layer properties

Abstract

This paper presents the results of an investigation of the electrical double layer properties for the systems Hg/NaF, Cd/NaF, Hg/Na 2SO 4 carried out by use of nonlinear a.c. methods, based on the quadratic approximation of the current–voltage characteristic of the cell, the two-frequency method, and the amplitude demodulation method. By use of these methods it is possible to measure the potentials of zero charge of metals at higher electrolyte concentrations than is possible with the cell impedance measurement method.