铀(Ⅵ)在氯化1-丁基-3-甲基咪唑中的电化学性质  

Electrochemical Behavior of Uranium(Ⅵ) in 1-Butyl-3-Methylimidazolium Chloride

作　　者：张秋月[1] 黄小红[1] 唐洪彬[1] 何辉[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：《核化学与放射化学》2011年第2期101-105,共5页Journal of Nuclear and Radiochemistry

摘　　要：通过循环伏安和计时电位等电化学测量方法研究了硝酸铀酰在亲水性离子液体——氯化1-丁基-3-甲基咪唑（[BMIM]Cl）中的电化学过程。结果表明,UO22＋在离子液体[BMIM]Cl中转移2个电子,一步还原为UO2。当扫描速率为10~100 mV/s、体系温度为353 K、UO22＋浓度为13.27 mmol/L时,电极反应UO22＋＋2e UO2为可逆反应。增大扫描速率,此电极反应转变为不可逆。测得UO22＋在[BMIM]Cl中的扩散系数D和活化能Ea分别为9.01×10-8cm2/s（353 K）和54.6 kJ/mol。采用恒电流150μA电解18 h,在不锈钢电极上沉积得到了铀。The electrochemical behavior of uranylnitrate in 1-butyl-3-methylimidazolium chloride（Cl） has been investigated by cyclicvoltammetry and chronopotentiometry.Reduction of UO2＋2 in Cl takes place through a single step two-electron transfer to UO2,which is reversible reaction at the potential sweep range of 10-100 mV/s.Diffusion coefficient and the energy of activation of UO2＋2 is 9.01×10-8 cm2/s at 353 K and 54.6 kJ/mol,respectively.Controlled current electrolysis of a solution of uranyl nitrate in Cl is carried out on a stainless steel plate at 150 μA for 18 h.Uranium is successfully deposited all over the surface of a stainless steel plate.

关 键 词：硝酸铀酰 氯化1-丁基-3-甲基咪唑 循环伏安 计时电位 电沉积 

分 类 号：O615.1[理学—无机化学]