Electrochemical Reduction of Indium (III) in Molten Lithium Chloride - Potassium Chloride Eutectic

The dependence of indium electro de potential vs. log. concentration of indium (III) is linear and the slopes determined are comparable with the slopes calculated from the Nernst equation, assuming n = 3. The potential of In/ln(III) has been determined to be 0.805 ± 0.003 V with respect to Pt/PtC12 (1 M). At 693 K the free energy of formation of the indium(III) chloride in a 1 M solution is -325, 398 ± 500 JImo!. Asingle chronopotentiometric wave is observed for the reduction of InC13 at -0.81 V vs the Pt(II)/Pt reference electrode. Based on analytical data n = 3, the diffusion coefficient was calculated to be 1.81 X lO-s cmS-l. The values of a na and kOf•h were calculated to be 0.6 and 3.25 X 10-3 cm S-l.