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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0.01mol/L的Dy3+离子在0.1mol/LLiCl-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)×10-10cm2/s。SEM和XRD分析表明,金属镝颗粒直径为几百纳米。
The electrochemical behavior of Dy3 + ions in 1-ethyl-3-methylimidazolium tetrafluoroborate (EMIMBF4) ionic liquid at Pt electrode was investigated. Cyclic voltammetry combined with chronoamperometry and chronopotentiometry showed that the electrochemical reduction of Dy3 + ions was an irreversible process, and the reduction was completed in one step, ie Dy3 + + 3e- → Dy. Chronoamperometry combined with potentiostatic electrolysis shows that the reduction of Dy3 + ions is controlled by diffusion. The transfer coefficient of Dy3 + ion with the concentration of 0.01mol / L in 0.1mol / L LiCl-EMIMBF4 ionic liquid was measured. The diffusion coefficients were 0.176 and 4.87-5.04 × 10-10cm2 / s, respectively. SEM and XRD analysis showed that the metal dysprosium particles were several hundred nanometers in diameter.