2004 Volume 51 Issue 1 Pages 48-51
The electrochemical behavior of platinum in dilute acidic media solutions were investigated using a rotating disc electrode system and a modified electrochemical cyclone cell at 25°C. Electrochemical polarization data showed that the limiting current density for platinum deposition was observed around −0.25 V (vs. SCE), and the diffusion coefficient of platinum estimated using Levich equation was 3.25 × 10-6cm2 s-1. The effects of several variables such as applied voltage, hydrochloric acid concentration and electrolyte flow rate were examined using a cyclone cell in order to obtain the optimum condition for electrowinning of platinum. More than 90% of the platinum in solution was recovered within an hour under the optimum conditions.
