期刊
ELECTROCHIMICA ACTA
卷 54, 期 2, 页码 203-208出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2008.08.009
关键词
Ferrate(VI); Hydroxide melt; Electrochemical synthesis; UV-vis spectroscopy; Anodic oxidation
资金
- Ministry of Education of the Slovak Republic [1/2476/05]
- Grant Agency of the Czech Republic [104/05/0066]
- National Science Foundation
The electrochemical synthesis of ferrate(VI) was studied in a molten salt environment as a function of temperature (170-200 degrees C). A eutectic NaOH-KOH melt was selected as the most appropriate system for this purpose. Cyclic voltammetry was used to characterize the processes taking place on the stationary iron electrode. The anodic current peaks corresponding to the ferrate(VI) production as well as cathodic current peaks corresponding to the ferrate(VI) reduction appeared to be strongly dependent on the temperature at which the experiment was performed. Ferrate(VI) formation by anodic oxidation of the iron electrode in the molten electrolyte during the batch electrolysis was confirmed for the first time by visible and Mossbauer spectroscopy. The maximum current efficiency of Fe(VI) formation reached during galvanostatic batch electrolysis has attained 72%. It was reached at the temperature of 170 degrees C. (c) 2008 Elsevier Ltd. All rights reserved.
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