In situ electrochemical measurement of O ~(2-) concentration in molten Li _2OLiCl during uranium oxide reduction process

摘要

A square wave voltammetric method has been applied to monitor the concentration of oxygen ions (O ~(2-)) during electrochemical reduction of uranium oxide in molten Li _2O-LiCl at 650C. The in-situ determination of O ~(2-) concentration is based on the relation between the O ~(2-) concentration and the peak current density, which was determined beforehand by the square wave voltammetry method at the various Li _2O concentrations. During the electrochemical reduction of uranium oxide, the in-situ measurements of the O ~(2-) concentrations done using square wave voltammetry showed good agreement with the results obtained from the acid titration method.