EuCl_3在氯化1-丁基-3-甲基咪唑中的电化学性质  

Electrochemical Behavior of Europium(Ⅲ) in 1-butyl-3-methylimidazolium

作　　者：张秋月[1] 何辉[1] 黄小红[1] 叶国安[1] 

机构地区：[1]中国原子能科学研究院放射化学研究所,北京102413

出　　处：《电化学》2010年第1期79-84,共6页Journal of Electrochemistry

基　　金：中国原子能科学研究院院长基金项目资助

摘　　要：应用循环伏安法研究了Eu3+在亲水性离子液体—氯化1-丁基-3-甲基咪唑([BMIM]Cl)中的电极过程.实验表明,工作电极为玻碳电极时,[BMIM]Cl的电化学窗口为-1.7～0.80V(vs.Ag/AgCl).Eu3+在[BMIM]Cl中被还原为Eu2+,此电极反应受电荷迁移和物质扩散共同控制.当体系温度从55℃升高到75℃时,Eu3+在[BMIM]Cl中的扩散系数D从3.75×10-9cm2/s变化到1.32×10-8cm2/s,该反应活化能Ea为62.6kJ/mol.The electrochemical behavior of EuCl3 in 1-butyl-3-methylimidazolium chlor/d（ [ BMIM] Cl） has been investigated in the temperature range of 328 - 348 K by cyclic voltammetry. Influences of scan speed and temperature in [ BMIM ] Cl have been examined. The electrochemical window of [ BMIM ] Cl was - 1.7 V - 0.80 V （vs. Ag/AgCl） ,when the working electrode was glassy carbon electrode. Eu^3＋ in [ BMIM] Cl underwent a single step one-electron transfer reduction to Eu^2＋ , which is quasi-reversible reaction controlled by both electron transfer and diffusion of ions. The diffusion coefficient of Eu^3＋ in [ BMIM ] Cl increased with increase of temperature from 3.75 ×10^-9 cm^2/s at 328 K to 1.32 ×10^-8 cm^2/s at 348 K and the activation energy was found to be 62. 6 kJ/mol.

关 键 词：离子液体 氯化1-丁基-3-甲基咪唑 铕 循环伏安 

分 类 号：TL24[核科学技术—核燃料循环与材料]