原位红外光谱法研究碱性溶液中对氯苯酚电还原反应  

In situ FTIR studies on electroreduction of 4-chlorophenol in basic solution

作　　者：马淳安[1] 刘艳娜[1] 李美超[1] 叶慧[1] 

机构地区：[1]浙江工业大学化学工程与材料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

出　　处：《化工学报》2009年第1期199-203,共5页CIESC Journal

基　　金：国家重点基础研究发展计划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：采用循环伏安和原位红外光谱技术,研究了对氯苯酚(4-CP)在碱性体系中的电化学还原反应。对氯苯酚在Ag电极、Pt电极和GC电极上的循环伏安行为表明,Ag电极对4-CP有较好的电还原活性,能在较正的电位下还原4-CP。通过原位红外光谱技术对4-CP在Ag电极上的电还原机理的初步探讨,结果表明4-CP首先在电极表面形成自由基负离子,随着电位的进一步负移,生成苯酚负离子,从而实现4-CP电化学脱氯降解的目标。Electrochemical reduction of 4-chlorophenol （4-CP） in basic solution was investigated by using cyclic voltammetry and in situ FTIR. The results of cyclic voltammograms showed that Ag electrode exhibited good performance for the electro reduction of 4-CP and the reduction reaction could take place at a more positive potential. The study on possible mechanism of 4-CP on Ag electrode by in situ FTIR spectroscopy suggested that 4-CP was electro-reduced to its radical ion initially, then its radical ion was transformed to phenolate at a more negative potential and electrochemical dechlorination of 4-CP was realized.

关 键 词：对氯苯酚 银电极 原位红外光谱技术 电还原 

分 类 号：O646.541[理学—物理化学] O657.33[理学—化学]