一氯乙酸和三氯乙酸在富勒烯/DDAB膜修饰电极上的电催化  

Electrocatalysis of Chloroacetic Acid and Trichloroacetic Acid at Fullerenes/Didodecyldimethylammonium Bromide Film Modified Electrodes

作　　者：李美仙[1] 李铮[1] 王放放[1] 朱志伟[1] 李南强[1] 顾镇南[1] 周锡煌[1] 

机构地区：[1]北京大学化学与分子工程学院,北京100871

出　　处：《分析化学》2005年第9期1211-1214,共4页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金(No.20105001);中国科学院长春应用化学研究所电分析化学国家重点实验室开放基金资助项目

摘　　要：研究了由阳离子表面活性剂双十二烷基二甲基溴化铵分别和C60或C70在玻碳电极表面形成的膜在0.5mol/LKCl溶液中的电化学,发现在0^-1.0V范围内,有两对峰形较好的还原再氧化峰。实验结果表明,该修饰电极有较好的稳定性和重现性,对三氯乙酸和一氯乙酸的还原,表现出良好的电催化去卤化作用,说明修饰电极上的富勒烯是良好的电子传递媒介体。The electrochemistry of films made from cationic surfactant didodecyldimethylammonium bromide （DDAB） containing C6o or C70 on a glassy carbon electrode was investigated in an aqueous solution containing 0. 5 mol/L KC1, and two couples of reduction/reoxidation peaks for C60 or C70 were found in the potential range from 0 to - 1.0 V. Electrochemically stable fullerene modified electrodes were produced in an aqueous solution. Furthermore, the fullerenes/DDAB film modified electrodes show electrocatalysis towards reduction of chloroacetic acid and trichloroacetic acid, indicating that fullerenes in the films are excellent electron-transfer mediators.

关 键 词：电催化 三氯乙酸 一氯乙酸 富勒烯 双十二烷基二甲基演化铵 化学修饰电极 膜修饰电极 DDAB 阳离子表面活性剂 甲基溴化铵 

分 类 号：O657.1[理学—分析化学]