Authors: Xingwen Yu Stuart Licht
Publish Date: 2008/03/08
Volume: 38, Issue: 6, Pages: 731-742
Abstract
Hexavalent iron species FeVI have been known for over a century and have longtime been investigated as the oxidant for water purification as the catalysts in organic synthesis and more recently as cathodic charge storage materials Conventional FeVI syntheses include solution phase oxidation by hyphchlorite of FeIII and the synthesis of less soluble superirons by dissolution of FeO4 2− and precipitation with alternate cations This paper reviews a new electrochemical FeVI synthesis route including both in situ and ex situ syntheses of FeVI salts The optimized electrolysis conditions for electrochemical FeVI synthesis are summarized Direct electrochemical synthesis of FeVI compounds has several advantages of shorter synthesis time simplicity reduced costs no chemical oxidant is required and providing a possible pathway towards more electroactive and thermal stable FeVI compounds FeVI analytical methodologies summarized in this paper are a range of electrochemical techniques FeVI compounds have been explored as energy storage cathode materials in both aqueous and nonaqueous phase in “superiron” battery configurations In this paper electrochemical synthesis of reversible FeVI/III thin film towards a rechargeable superiron cathode is also summarized
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