温度与碱浓度对FeO_4^(2-)/FeO_2^-体系电化学行为的影响  

Effects of Temperature and Concentration of NaOH Solutions on Electrochemical Behavior of FeO_4^(2-)/FeO_2^-

作　　者：张存中[1] 章谚[1] 吴锋[1] 杨倩[1] 杨凯[1] 

机构地区：[1]北京理工大学化工与环境学院

出　　处：《化学研究》2006年第1期51-55,共5页Chemical Research

基　　金：国家重点基础研究发展规划(2002CB211800);国家基础研究重大项目前期研究专项(2001CCA05000);北京理工大学基础研究基金资助项目(05120404)

摘　　要：研究了影响Fe(OH)3进行酸式电离反应的因素,在多种浓度和温度条件下的NaOH浓溶液中采用SnO2-Sb2O3/Ti电极,研究FeO42-/FeO2-体系的电化学氧化还原反应参数及其变化趋势,结果证实该体系发生电化学氧化还原反应的最佳碱溶液浓度范围为12~14 mol/L,最佳温度范围为295~315 K.阐明了在实验条件下FeO42-/FeO2-氧化还原体系中存在由FeO43-/FeO2-构成的氧化还原电对,而FeO42-不直接与FeO2-构成氧化还原电对;并给出了FeO42-/FeO2-氧化还原体系的Latim er图.The behavior of acidic ionization of Fe （OH） 3 ters and variational trend of FeO4^2-/FeO2^- system were was investigated. The electrochemical parameresearched on SnO2-Sb2O3/Ti electrode in different concentrated NaOH solutions at different temperature. The results exhibited that the redox reaction of FeO4^2-/FeO2^-system reaches optimal at condition of 12 - 14 mol/L OH^- and at temperature of 295-315 K. The result indicated that reasonable redox couple was not FeO4^2-/FeO2^- but FeO4^2-/FeO2^-, that means, Fe （Ⅴ） / Fe （Ⅲ） is reasonable part of redox system FeO4^2-/FeO2^- at experimental condition. Furthermore, the Latimer figure of redox system FeO4^2-/FeO2^- was suggested and the role of Fe （Ⅴ） species was discussed.

关 键 词：高铁酸盐 酸式电离 Latimer图 尺寸稳定阳极 析氧反应 

分 类 号：O646.2[理学—物理化学]