The adoption and mechanism of KIO₄ for redox-equilibrated stabilization of FeO₄ ²⁻ as an equalizer in water

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• 作者：Baohui Wang ; Jing Dong ; Di Gu ; Hongjun Wu ; Stuart Licht
• 关键词：Ferrate ; Potassium periodate ; Stability ; Water treatment ; Super ; iron battery
• 刊名：Ionics
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：22
• 期：10
• 页码：1967-1972
• 全文大小：542 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Electrochemistry
  Materials Science
  Physical Chemistry
  Condensed Matter
  Renewable Energy Sources
  Electrical Power Generation and Transmission
  
• 出版者：Springer Berlin / Heidelberg
• ISSN：1862-0760
• 卷排序：22

文摘

The inherent thermodynamic instability of FeO₄2− in water restricts its applications in water treatment, battery, and organic synthesis. The objective of this paper was to research and develop an additive for stabilization and mechanism of aqueous FeO₄2− solution on the basis of a choice of the redox equilibration. In this study, it was found that FeO₄2− in water was stabilized by the right match and adoption of KIO₄ called an equalizer. The redox thermodynamic analysis and dynamic experimental results show that the adoption of KIO₄ equalizer greatly increased lifetime of FeO₄2− in water by orders of magnitude. The stabilization mechanism is attributed to occur via the effect of redox equilibrium of the FeO₄2− and the IO₄− species, as well as the formation of an oxidizing chemical environment. This study opens up possibilities for stabilization of solid ferrate compounds, for example, for use in the water treatment and super-iron battery.