以[BMIM][Cl]离子液体为添加剂制备普鲁士蓝修饰电极及其电化学催化性质的研究  

Preparation and Electrocatalytic Characteristics of a Prussian Blue Modified Electrode via Ionic Liquid [BMIM][Cl]as Electrolyte Additive

作　　者：王泽[1] 贾晓光[1] 朱永春[1] 张洪波[2] 段纪东[2] 张玲[1] 

机构地区：[1]沈阳师范大学化学与生命科学学院,辽宁沈阳110034 [2]沈阳师范大学实验教学中心,辽宁沈阳110034

出　　处：《分析测试学报》2015年第9期1055-1060,共6页Journal of Instrumental Analysis

基　　金：国家自然科学基金(21203126/B030607);辽宁省高等学校优秀人才支持计划(LJQ2013112);沈阳师范大学博士启动基金(054-55440107029)

摘　　要：以氯化1-丁基-3-甲基咪唑离子液体([BMIM][Cl])为溶液添加剂,通过电沉积方法制备了普鲁士蓝(Prussian blue,PB)修饰的碳糊电极(PB-IL/CPE);采用循环伏安法检测了不同[BMIM][Cl]浓度下制备的PB-IL/CPE的电化学性能和动力学特征。同时采用计时安培法检测了PB-IL/CPE对过氧化氢的催化性能。实验结果表明,离子液体的存在能够提高PB在电极表面的沉积电流,[BMIM][Cl]浓度为0.2 mmol/L时,PB的氧化还原电流最大;相对于在无[BMIM][Cl]存在下制备的PB修饰电极(PB/CPE),PB-IL/CPE对过氧化氢的催化效果更好,线性范围更宽,灵敏度更高;此外,PB-IL/CPE电极的动力学特征显示,K+在PB-IL/CPE表面的扩散速率明显提高,为4.45×10-11cm2·s-1。1-Butyl-3-methylimidazolium chloride（ [BMIM][Cl]） ionic liquid was used as a novel electrolyte additive to prepare a prussian blue（ PB） modified carbon paste electrode（ PB- IL/CPE） by electrodeposition method. The electrochemical property and kinetic characteristics of PB- IL/CPE were studied by cyclic voltammetry. The electrocatalytic reduction behavior of H2O2 on PB- IL/CPE was detected by chronoamperometry. The results demonstrated that the depositing current of PB was related to the concentration of [BMIM][Cl],and the highest redox currents for PB electrodeposition were obtained at 0. 2 mmol/L [BMIM][Cl]. Compared to PB/CPE electrode prepared in absence of[BMIM][Cl],the PB- IL/CPE showed more powerful electrocatalytic reduction to H2O2,with wider linear detection range and higher sensitivity. In addition,the kinetics of PB- IL/CPE was also discussed. In comparison with that on PB/CPE,higher diffusion coefficient of K＋（ 4. 45 × 10- 11cm2·s- 1） on PB- IL/CPE was obtained.

关 键 词：离子液体 碳糊电极 普鲁士蓝 电催化还原 

分 类 号：O657.1[理学—分析化学] TQ123.6[理学—化学]