ELECTROCHEMICAL BEHAVIOR OF BISMUTH IONS IN ETHYLENE GLYCOL

The present work is devoted to the electrochemical reduction of bismuth ions from non-aqueous electrolytes using ethylene glycol as an example. By taking cyclic and linear polarization curves on a platinum electrode, the kinetics, the mechanism of the process, and it was found that the process of electroreduction proceeds in a one-stage process in the potential range 0.45–(–2.0) V. By the Gorbachov method, was calculated the effective activation energy. The calculation results show that the process of electroreduction of bismuth ions from non-aqueous electrolytes is accompanied by diffusion polarization. Studied also, the influence of various factors (temperature, concentration, scan rate) on the electroreduction of bismuth ions are studied. Using these studies, the optimal electrolyte mode and composition were selected for the process of electroreduction of bismuth ions. Electrolyte composition: 0.1 Bi(NO3)35H2O+CH2OH–CH2OH; T =298 K., ЕV = 0.03 V/sec