ELECTROCHEMICAL REDUCTION OF FE(II) IONS ON DIFFERENT SOLID ELECTRODES IN FUSED ZNCL2-2NACL MIXTURE

The electrodeposition of Fe(II) in ZnCl2-ZNaCl melt at 450 degrees C w as studied at molybdenum and tungsten electrodes and the results are c ompared with those obtained at glassy carbon in previous work. The kin etics of the electrodeposition and electrocrystallization of iron were studied, showing that the process is quasireversible, and the values of the kinetic parameters k(o) and alpha were obtained. Mass transport towards the electrode is a simple diffusion process and the diffusion coefficient was obtained by applying different electrochemical techni ques. Potential step measurements indicate that instantaneous nucleati on and growth phenomena play a part in the overall process.