To study and optimize the process parameters such as current density, temperature, concentration of cerium(III) methanesulphonate and methanesulphonic acid, and kinetics for the electrochemical generation of cerium(IV) methanesulphonate in aqueous methane sulfonic acid medium. A 97% current efficiency and conversion was achieved at 5 A/dm(2) current density in 0.8 M cerium(III) methanesulphonate with 2 M methanesulphonic acid medium at 50 degrees C temperature.