化工学报2016，Vol.5Issue(5)：1998-2004,7.DOI:10.11949/j.issn.0438-1157.20151486
二元离子液体OMImBF4/HMImPF6中硝基苯的电化学还原
Electrochemical reduction of nitrobenzene in binary ionic liquid of OMImBF4/HMImPF6
摘要
Abstract
A mixture of ionic liquids (ILs), OMImBF4 and HMImPF6 was prepared, for which its conductivity and infrared spectroscopy (IR) were measured in comparison with those of components. In the binary IL system with varied volume ratios of OMImBF4/HMImPF6, techniques of cyclic voltammetry (CV), chronoamperometry (CA), constant-potential electrolysis,in-situ Flourier transform infrared spectroscopy (in-situ FTIRS), GC-MS and GC were employed to investigate electrochemical reduction of nitrobenzene. It showed that, the conductivity of OMImBF4/HMImPF6 decreased with the concentration of HMImPF6 component, and IR bands of [BF4]? and [PF6]? in the IL mixture obviously changed from each single component. The OMImBF4/HMImPF6 IL system with 3:1 of volume ratio exhibited a higher current density and a more positive potential for the reduction of nitrobenzene, and also the selectivity and yield of main product azobenzene than single component ILs. The rate-determining step in the electrochemical reduction of nitrobenzene is diffusion, of which diffusion coefficient is 2.024×10?7 cm2·s?1.关键词
硝基苯/离子液体/二元混合物/电化学/原位红外光谱Key words
nitrobenzene/ionic liquids/binary mixture/electrochemistry/in-situ Flourier transforms infrared spectroscopy分类
化学化工引用本文复制引用
毛信表,何峰强,张寅旭,陈松,刘莹,马淳安..二元离子液体OMImBF4/HMImPF6中硝基苯的电化学还原[J].化工学报,2016,5(5):1998-2004,7.基金项目
国家自然科学基金项目(21076192) （21076192）
国家重点基础研究发展计划项目(2012CB722604) （2012CB722604）
浙江省公益性技术应用研究计划功能离子液体中CO2电催化合成碳酸二甲酯研究项目(2014C31159).supported by the National Natural Science Foundation of China (2020619), the National Basic Research Program of China (2012CB722604) and the Zhejiang Province Public Technology Applied Research Projects (2014C31159). （2014C31159）
