在室温离子液体BPBF_4中FeCl_3电化学性质的研究  

Study on Electrochemistry of FeCl_3 in Room Temperature Ionic Liquid: BPBF_4

作　　者：杨家振[1] 金一[1] 潘伟[1] 

机构地区：[1]辽宁大学化学系,沈阳110036

出　　处：《化学学报》2004年第20期2035-2039,F008,共6页Acta Chimica Sinica

基　　金：辽宁省自然科学基金 (Nos.2 0 0 1 1 0 2 0 35 ;2 0 0 2 2 0 4 5)资助项目

摘　　要：以室温离子液体———四氟硼酸正丁基吡啶 (BPBF4)为溶剂 ,在 2 93 15～ 3 43 15K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FeCl3The cyclic voltammograms for various molarities: C = 0.03833, 0.07170 and 0.08954 Mol/dm(3) 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 similar to 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 Fe 3, 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.

关 键 词：室温离子液体 三氯化铁 电化学性质 四氟硼酸正丁基吡啶 扩散活化能 扩散系数 

分 类 号：O614[理学—无机化学]