1099-0062/2012/15(3)/E11/3/$28.00 © The Electrochemical Society In Situ Electrochemical Measurement of O2− Concentration in Molten Li2O/LiCl during Uranium Oxide Reduction Process Eun-Young Choi,a,z In-Kyu Choi,a Jin-Mok Hur,a Dae-Seung Kang,a

A square wave voltammetric method has been applied to monitor the concentration of oxygen ions (O2−) during electrochemical reduction of uranium oxide in molten Li2O-LiCl at 650◦C. The in-situ determination of O2 − concentration is based on the relation between the O2 − concentration and the peak current density, which was determined beforehand by the square wave voltammetry method at the various Li2O concentrations. During the electrochemical reduction of uranium oxide, the in-situ measurements of the O2 − concentrations done using square wave voltammetry showed good agreement with the results obtained from the acid titration method