STUDY ON ELECTROWINNING OF COBALT BY CYCLIC VOLTAMMETRYTECHNIQUE

Abstract: the competition between the precipitation of cobalt ions and evolution of hydrogen gas on the cathode surface duringthe reduction process in a sulfate bath, investigation on the mechanism of metal precipitation is of great importance.In the present work, study on the kinetics of cobalt electrowinning and the mechanism of the involved reactions havebeen carried out. The obtained results, confirm the mechanism of cobalt precipitation by depletion of hydroxides. Theeffects of temperature and scan rate parameters were studied on electrowinning of cobalt by cyclic voltammetrytechnique. The diffusion coefficient and rate constant of the reactions were measured and calculated by performedexperiments.Nowadays cobalt is mostly produced through the electrowinning process of sulfate solutions. Regarding to

کلیدواژه ها:

Cobalt ، Electrowinning ، Mechanism ، Kinetics and Cyclic voltammetry