硝基甲烷在离子液体BMImPF6中的电化学行为  

Electrochemical behavior of nitromethane in ionic liquid BMImPF_6

作　　者：马淳安[1] 王晓娟[1] 李国华[1] 李美超[1] 陈松[1] 

机构地区：[1]浙江工业大学绿色化学合成技术国家重点实验室培育基地,化学工程与材料学院,浙江杭州310032

出　　处：《化工学报》2008年第3期653-658,共6页CIESC Journal

基　　金：国家基础研究重大项目前期研究专项基金项目(2003CCA01300);国家自然科学基金项目(20376074);浙江省自然科学基金项目(Y406381)~~

摘　　要：以铂微盘电极为工作电极,采用循环伏安等测试方法研究了硝基甲烷在离子液体1-正丁基-3-甲基咪唑六氟磷酸盐(BMImPF6)中的电化学行为,讨论了温度、扫描速度以及底物浓度等因素对其电化学行为的影响。结果表明,硝基甲烷在离子液体BMImPF6中的还原反应是受扩散控制的不可逆过程。估算了不同温度下硝基甲烷在离子液体BMImPF6中的扩散系数及其与温度的Arrhenius关系,其扩散活化能Ea为22.28kJ.mol-1。The electrochemical behavior of nitromethane was investigated using cyclic voltammetry in the room temperature ionic liquid 1-butyl-3-methylimidazolium hexafluorophate （BMImPF6） on a platinum disk microelectrode. The influences of temperature, scan rate and nitromethane concentration on the electrochemical characteristics of nitromethane were also discussed. The results showed that nitromethane was reduced irreversibly by one electron, and the electrode process was controlled by diffusion. According to the Randles-Sevcik equation, the diffusion coefficients of nitromethane were estimated for each temperature in BMImPF6, which increased with temperature owing to the diminution of BMImPF6 viscosity. According to the Arrhenius equation, the activation energy of diffusion of nitromethane in BMImPF6 was also calculated to be 22.28 kJ·mol^-1.

关 键 词：硝基甲烷 离子液体 1-正丁基-3-甲基咪唑六氟磷酸盐 微盘电极 扩散系数 

分 类 号：O64[理学—物理化学]