化学学报 ›› 2004, Vol. 62 ›› Issue (20): 2035-2039. 上一篇    下一篇

研究论文

在室温离子液体BPBF4中FeCl3电化学性质的研究

杨家振, 金一, 潘伟   

  1. 辽宁大学化学系, 沈阳, 110036
  • 投稿日期:2003-08-10 修回日期:2004-05-26 发布日期:2014-02-17
  • 通讯作者: 杨家振,E-mail:jzyanglnu@yahoo.com.cn E-mail:jzyanglnu@yahoo.com.cn
  • 基金资助:
    辽宁省自然科学基金(Nos.2001102035,20022045)资助项目.

Study on Electrochemistry of FeCl3 in Room Temperature Ionic Liquid: BPBF4

YANG Jia-Zhen, JIN Yi, PAN Wei   

  1. Department of Chemistry, Liaoning University, Shenyang 110036
  • Received:2003-08-10 Revised:2004-05-26 Published:2014-02-17

以室温离子液体--四氟硼酸正丁基吡啶(BPBF4)为溶剂,在293.15~343.15 K温度范围内,测定了不同浓度FeCl3的伏安曲线,估算了在不同浓度和不同温度下Fe3+的扩散系数D,进而求得了它在不同浓度下的扩散活化能ED,讨论了FeCl3浓度对扩散系数和扩散活化能的影响.

关键词: 室温离子液体, 伏安曲线, 扩散系数, 扩散活化能, 四氟硼酸正丁基吡啶

The cyclic voltammograms for various molarities: C=0.03833, 0.07170 and 0.08954 mol/dm3 of FeCl3 in the room temperature ionic liquid——BPBF4 at GC working electrode referred to Al/Al3+ by different scan rates were measured over temperature range 293.15~343.15 K. Analysis of the voltammograms indicates that the Fe3+ reduction reaction is a reversible process with one transfer electron. According to Randles-Sevcik's equation, values of diffusion coefficient of Fe3+ for various concentrations at different temperatures were estimated. And in terms of Arrenius' equation, values of its diffusion activation energy for various concentrations of Fe3+ were obtained. As temperature increases, values of the diffusion coefficient also increase owing to the diminution of the BPBF4 viscosity. However, as the FeCl3 molarity increases, values of the diffusion coefficient diminish and the diffusion activation energy increases because of the solute-solvent interaction of FeCl3 in BPBF4.

Key words: room temperature ionic liquid, voltammogram, diffusion coefficient, diffusion activation energy, BPBF4