Electrochemical oxidation behavior of 1,4-dichlorobenzene on Pt electrodes in mixed solvent

LIU Qi; WANG Jiade; LIU Chenliang; CHEN Jianmeng

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Electrochemical oxidation behavior of 1,4-dichlorobenzene on Pt electrodes in mixed solvent

更新时间：2025-12-10

- Electrochemical oxidation behavior of 1,4-dichlorobenzene on Pt electrodes in mixed solvent
- CIESC Journal Issue 2, Pages: 471-475(2009)
- 作者机构：
  
  浙江工业大学环境工程研究中心
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Online First：05 February 2009，
  
  Published：05 February 2009
- 稿件说明：
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LIU Qi, WANG Jiade, LIU Chenliang, et al. Electrochemical oxidation behavior of 1,4-dichlorobenzene on Pt electrodes in mixed solvent[J]. CIESC Journal, 2009, (2): 471-475.
DOI：

LIU Qi, WANG Jiade, LIU Chenliang, et al. Electrochemical oxidation behavior of 1,4-dichlorobenzene on Pt electrodes in mixed solvent[J]. CIESC Journal, 2009, (2): 471-475. DOI：

摘要

为有效去除化工废水中的1

4-二氯苯，研究了Pt电极上乙腈-水混合溶剂中1

4-二氯苯电氧化机理。计时电流法研究表明，氧化过程中既有电极表面失电子的直接电化学氧化，又有基于活性自由基的间接氧化。通过SEM表征和Pt电极表面观察，证明Pt电极在2.3 V(vs. SCE)的电位下氧化p-DCB过程中，表面存在黄色有机聚合物膜，致使体系的导电性变差。降解途径推断表明，反应首先经历了脱氯和对氯酚、对苯醌等芳香类中间体的生成；接着开环生成小分子有机酸；最后小分子羧酸进一步氧化成CO2。

Abstract

The mechanism and characteristics of electrochemical oxidation of 1

4-dichlorobenzen in simulated wastewater were investigated on a platinum electrode.The cyclic voltammetric profiles showed that the oxidation peak potential and current density increased with the increase of the concentration of 1

4-dichlorobenzene

nevertheless

the oxidation potential of 1

4-dichlorobenzene in acetonitrile-aqueous solution was smaller than that in acetonitrile solution.Chronoamperometric experimental results suggested that the 1

4-dichlorobenzene degradation included both direct electro-oxidation of 1

4-dichlorobenzene by loss of electrons and indirect oxidation with anodically formed free radicals.Additionally

parachlorophenol

4-benzoquinone

maleic acid

oxalic acid

acetic acid

and formic acid were identified as main electro-oxidation products by ion chromatography or high performance liquid chromatography.Moreover

a yellow polymer film

which influenced the electrochemical oxidation process

was clearly identified as a rough surface after electrochemical reaction in comparison to a smooth and glossy surface of platinum electrodes without polymer film as observed from SEM image.

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