Electrochemical Ferrate(VI) Synthesis: A Molten Salt Approach

摘要

The electrochemical synthesis of ferrate(VI) was studied for the first time in a molten salt environment. An eutectic NaOH-KOH melt at the temperature of 200 °C was selected as a most appropriate system for the synthesis. Cyclic voltammetry was used to characterize the processes taking place on the stationary platinum (gold) or iron electrodes. The identified anodic current peak corresponding to the ferrate(VI) production was close to the potential region at which oxygen evolution begins. During the reverse potential scan, well defined cathodic current peak corresponding to the ferrate(VI) reduction appears. However, the peak was shifted to less cathodic potential than that of potential corresponding to the electrolysis in aqueous solutions. This indicates less progressive anode inactivation in a molten salts environment.