Determination of optimum production condition and characterization of Potassium Ferrate particles synthesized by electrochemical method

Production efficiency and energy consumption are two important factors in electrochemical synthesis of potassium ferrate particles. In this research, the effects of different parameters including applied current density, KOH electrolyte concentration and its temperature on production efficiency and energy consumption have been studied. The condition of optimized production has achieved in current density of 40 mA.cm-2, 13M KOH electrolyte with temperature of 70 oC for two hours. In this situation, the production efficiency was 84.63% and the energy consumption was 5.05 kwh/kg. In next step, the effect of time duration on production efficiency, purity, formed phases and the size of potassium ferrate particles has been investigated in optimal condition. The results showed that due to decomposition of potassium ferrate particles with time, iron hydroxides and oxides components have been formed which reduces the purity and production efficiency. The sizes of potassium ferrate particles were measured by two method of Debye-Scherrer and modified Debye-Scherrer. This revealed that the size of potassium ferrate particles increases as time passes.