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

The electrochemical behavior of uranylnitrate in 1-butyl-3-methylimidazolium chloride (［BMIM］Cl) has been investigated by cyclicvoltammetry and chronopotentiometry. Reduction of UO₂²⁺ in ［BMIM］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 UO₂²⁺ 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 ［BMIM］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.