ELECTROCHEMICAL REDUCTION OF TANTALUM IN MOLTEN NaCl KCl-K_(2)TaF_(7)

摘要

The cathode process of tantalum ion in molten NaCl-KCl-K_(2)TaF_(7),at 720°Cwas investigated by three transient electrochemical techniques.The results show that the electroreduction reaction of Ta5*involves a single reversible five electron step.The diffusion coefficients of the complexion containing Tas*measured by above mentioned techniques are alike such as 1.15×10^(-5)by cyclic voltammetry.1.10×10^(-5)by chronopotentiometry and 1.15×10^(-5)by chronoamperometry respectively.The effect of electroactive species containing oxygen on tantalum reduction process was also studied.