Electrochemical Ferrate(VI) Synthesis: A Molten Salt Approach
- M. BenováM. BenováDepartment of Inorganic Technology, Slovak University of Technology in Bratislava, 812 37 Bratislava, SlovakiaMore by M. Benová
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- J. HívešJ. HívešDepartment of Inorganic Technology, Slovak University of Technology in Bratislava, 812 37 Bratislava, SlovakiaMore by J. Híveš
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- K. BouzekK. BouzekDepartment of Inorganic Technology, Institute of Chemical Technology Prague, 166 28 Prague, Czech RepublicMore by K. Bouzek
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- V. K. Sharma
Abstract
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.