Electrochemical investigation on stable iron ion valence in molten KCl-CaCl2-NaCl-MgCl2 melts

摘要：

The electrochemical behavior of iron ion in KClCaCl2-NaCl-MgCl2 melts with FeCl2 and FeCl3 were studied by cyclic voltam-metry, chronopotentiometry and square wave voltammetry at 700 ℃. The results showed that either a small amount of Fe3+ or Fe2+ was added to the melts, only a reduction peak and a corresponding oxidation peak were observed, which was attributed to the electrochemical redox of Fe2+/Fe. Therefore, only Fe2+ could stably exist in the K.ClCaCl2-NaCl-MgCl2 melts due to chemical decomposition of Fe3+ at 700 ℃, which provided an important support to remove iron ion as an impurity in magnesium electrolysis.

关键词： iron ion electrochemical molten salts chloride

作者: LI Bing LOU Jingwei WANG Heng YU Jianguo

作者单位: State Key Lab of Chemical Engineering, East China University of Science and Technology, Shanghai 20023 7, China

会议类型: 国际会议

会议名称: The 3rd Asian Conference on Molten Salts and Ions Liquids 2011(第三届亚洲熔盐与离子液体会议)

会议地点: 哈尔滨

会议语种:英文

页码: 96-98

在线出版日期: 2011-01-06（万方平台首次上网日期，不代表论文的发表时间）