KINETICS OF THE OXYGEN-ELECTRODE REACTION IN MOLTEN LI+NA CARBONATE EUTECTIC .6. QUANTITATIVE-ANALYSIS OF THE LINEAR SCAN VOLTAMMETRIC CURVES FOR THE 1ST REDUCTION PROCESS AT MONOCRYSTALLINE NIO ELECTRODES

A theoretical model is proposed for the linear voltammetric peak '1' of oxygen reduction in molten Li+Na carbonates, as observed on NiO monocrystalline electrodes and described in Part 5 of this series of papers. The model assumes the diffusion-controlled reaction O22- + 2e- half arrow right over half arrow left 2O2- and a finite, effective ohmic resistance of the electrodes. The comparison of the simulation results and experimental data for Au and NiO electrodes confirms that the same reaction can be attributed to the peak in both cases. The model allows also the ohmic resistance of the electrode to be evaluated from experimental data.