Electrolytic Rectification and Cathodic Charge Reversibility of Some Valve Metals

Abstract

Optical studies and observations of electrode cathodic charge reversibility suggest a bulk rather than local effect in the electrolytic rectification behaviour of Ti and Nb electrodes. The proposed model involves reversible incorporation of hydrogen into the surface oxide films where it acts as a donor impurity. Applicability of the model to Al and Zr electrodes is discussed.