INTERNAL REFERENCE SYSTEMS FOR FUSED ELECTROLYTES

The transient oxidation of the electrode material or a constituent of the electrolyte has been used to generate an internal reference system . This technique is convenient for standardizing the reference electro des used in fused electrolytes at high temperatures. Applications are described for the model case of fused NaCl + KCl, where the internal r eference system is either the couple Pt2+/Pt (platinum working electro de) or the couple Cl2/Cl- (oxidation of the constitutive Cl- ions at a carbon electrode). The standard potentials of the internal systems ar e determined from cyclic voltammetry.