1-乙基-3-甲基-咪唑四氟硼酸盐离子液体中镝电沉积行为

Electrodeposition Behavior of Dysprosium in EMIMBF4 Ionic Liquid

摘要:

研究室温下Pt电极上Dy3+离子在1-乙基-3-甲基-咪唑四氟硼酸盐 (EMIMBF4) 离子液体中的电化学行为。循环伏安法结合计时电流法和计时电位法研究结果表明，Dy3+离子的电化学还原是不可逆过程，还原为一步完成，即Dy3++3e-→Dy。计时电流法结合恒电位电解研究表明，Dy3+离子的还原过程受扩散控制。测得浓度0.01 mol/L的 Dy3+离子在0.1 mol/L LiCl-EMIMBF4离子液体中的传递系数、扩散系数分别为0.176和 (4.87-5.04)×10-10 cm2/s。SEM和XRD分析表明，金属镝颗粒直径为几百纳米。

Abstract:

The electrodeposition of dysprosium on a Pt electrode from 1-ethyl-3-methyl-imidazolium tetrafluoroborate (EMIMBF4) ionic liquid was investigated. The cyclic voltammetry, chronopotentiometry and chronoamperometry were employed to examine the electrochemistry of Dy3+ in 0.01 mol/L DyCl3-0.1 mol/L LiCl-EMIMBF4 ionic liquid. The electrochemistry experiments indicate that the reduction of Dy3+ ion in 0.01 mol/L DyCl3-0.1 mol/L LiCl-EMIMBF4 ionic liquid is an irreversible process and is completed through only one step electrodeposition mechanism Dy3+ + 3e-→Dy. In 0.01 mol/L DyCl3-0.1 mol/L LiCl-EMIMBF4 ionic liquid the transfer coefficient and the diffusion coefficient of Dy3+ ion have been determined to be 0.176 and (4.87-5.04)×10-10 cm2/s, respectively. XRD pattern shows that the dysprosium deposits can be obtained, and SEM images shows that crystallites sizes of the deposits are few hundred nanometers.