离子液体EMBF_4中对硝基甲苯电还原的研究

Electrochemical Reduction of p-Nitrotoluene in Ionic Liquid EMBF_4

采用循环伏安法研究了离子液体EMBF4(1-乙基-3-甲基咪唑四氟硼酸)中对硝基甲苯在微铂电极上的电还原特性.实验结果表明:在EMBF4中,对硝基甲苯能够进行电还原反应,随着对硝基甲苯浓度增加,循环伏安曲线峰1和峰2的峰电位负移,峰电流增加;随着电解液中水浓度的增加,循环伏安曲线峰1峰电位正向移动,峰2峰电位负向移动,峰1和峰2的峰电流都增大;对硝基甲苯在离子液体EMBF4的电还原过程中扩散是其主要的控制步骤.

The electroreduction performance of p-nitrotoluene in ionic liquid EMBF4 was studied by means of cyclic voltammetry.Experimental results showed that p-nitrotoluene could be reducted in EMBF4.By the curve of cyclic voltammetry,the first and second electroreduction peak potential were shifted to the negative direction with the increasing concentration of p-nitrotoluene,the responding electroreduction peak current were also increased,with the increasing concentration of water,the first electroreduction peak potential was shifted to the positive direction.However,the second peak potential was shifted to the negative direction.It was proved that the whole electroreduction peak current were increased.In the process of p-nitrotoluene electroreduction in ionic liquid EMBF4 diffusion was the main controlling step.