Electrochemical reduction of nitrobenzene in binary ionic liquid of OMImBF<sub>4</sub>/HMImPF<sub>6</sub>

MAO Xinbiao; HE Fengqiang; ZHANG Yinxu; CHEN Song; LIU Ying; MA Chun'an

doi:10.11949/j.issn.0438-1157.20151486

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Electrochemical reduction of nitrobenzene in binary ionic liquid of OMImBF₄/HMImPF₆

更新时间：2025-12-10

- Electrochemical reduction of nitrobenzene in binary ionic liquid of OMImBF₄/HMImPF₆
- CIESC Journal Issue 5, Pages: 1998-2004(2016)
- 作者机构：
  
  1. 浙江工业大学化学工程学院, 绿色化学合成技术国家重点实验室培育基地,浙江,杭州,310032
  2. 盐城工学院,江苏,盐城,224051
- 作者简介：
- 基金信息：
- DOI：10.11949/j.issn.0438-1157.20151486
  CLC： 64
- Online First：05 May 2016，
  
  Published：05 May 2016
- 稿件说明：
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MAO Xinbiao, HE Fengqiang, ZHANG Yinxu, et al. Electrochemical reduction of nitrobenzene in binary ionic liquid of OMImBF₄/HMImPF₆[J]. CIESC Journal, 2016, (5): 1998-2004. DOI: 10.11949/j.issn.0438-1157.20151486.
DOI：

MAO Xinbiao, HE Fengqiang, ZHANG Yinxu, et al. Electrochemical reduction of nitrobenzene in binary ionic liquid of OMImBF₄/HMImPF₆[J]. CIESC Journal, 2016, (5): 1998-2004. DOI: 10.11949/j.issn.0438-1157.20151486. DOI：

摘要

将离子液体OMImBF4与HMImPF6二元复合

研究了离子液体复合前后电导率、红外谱峰等的变化

在不同体积比的OMImBF4/HMImPF6体系中采用循环伏安法(CV)、计时电流法(CA)和电化学原位红外光谱法(In-situ FTIRS)等方法探究了硝基苯在铂电极上的电化学还原行为。研究结果表明

OMImBF4/HMImPF6的电导率随HMImPF6体积比的增大而减小

红外谱峰较单一离子液体变化明显;硝基苯在体积比为3:1的二元离子液体OMImBF4/HMImPF6体系中的还原峰电位及还原峰电流均优于单一离子液体

且主要产物偶氮苯的选择性及硝基苯的转化率都要优于单一离子液体。硝基苯在此二元离子液体体系中的还原过程受扩散控制

扩散系数D为 2.024×10-7 cm2·s-1。

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.

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MAO Xinbiao

LIU Ying

CHEN Da

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MA Chun'an

Xue FU

Tingting CHEN

Yingjie XU

Related Institution

State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology

College of Chemistry and Chemical Engineering, Shaoxing University

School of Chemistry and Chemical Engineering, Inner Mongolia University of Science and Technology

Key Laboratory of Synthetic and Biological Colloids，Ministry of Education, School of Chemical and Material Engineering，Jiangnan University

Zhengzhou Key Laboratory of Fine Chemicals, School of Material and Chemical Engineering, Zhengzhou University of Light Industry

⁰

Electrochemical reduction of nitrobenzene in binary ionic liquid of OMImBF4/HMImPF6

DOI：10.11949/j.issn.0438-1157.20151486

摘要

Abstract

关键词

Keywords

references

Electrochemical reduction of nitrobenzene in binary ionic liquid of OMImBF₄/HMImPF₆