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 chlorid([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.Eu3+ in[BMIM]Cl underwent a single step one-electron transfer reduction to Eu2 +,which is quasi-reversible reaction controlled by both electron transfer and diffusion of ions.The diffusion coefficient of Eu3 + in [BMIM]Cl increased with increase of temperature from 3.75 × 10-9 cm2 /s at 328 K to 1.32 × 10-8 cm2 /s at 348 K and the activation energy was found to be 62.6 kJ/mol.