对苯二酚在普鲁士蓝修饰电极上的电化学行为  

Study on electrochemical behaviors of hydroquinone at the electrode modified with prussian blue films

作　　者：杜艳芳[1] 郑亚楠[1] 

机构地区：[1]华东师范大学化学与分子工程学院,上海200241

出　　处：《分析试验室》2016年第4期464-467,共4页Chinese Journal of Analysis Laboratory

摘　　要：利用循环伏安法制备普鲁士蓝修饰玻碳电极(PB/GC),电极对对苯二酚具有良好的电催化作用,PB/GC电极上的氧化还原峰电流比裸电极大两个数量级,峰电位之差从0.83V减少到0.48V;考察了修饰电极膜的厚度与峰电流关系,当扫描圈数大于60圈时,峰电流不再随着薄膜厚度的增加而变大,峰电流与扫描速度的平方根呈线性关系,说明膜电极在界面传质为线性扩散控制;采用计时电量和电化学阻抗法研究对苯二酚的电化学行为,求得在不同厚度修饰电极膜上的扩散系数,此电极可用来快速检测对苯二酚。Prussian blue modified glass carbon electrodes（ PB / GC） were prepared by using cyclic voltammetric（ CV） method. The results showed the electrode has good electrocatalysis for hydroquinone. The oxidation and reduction peak currents were significantly increased by two orders of magnitude. The difference of the peak potential was reduced from 0. 83 V to 0. 48 V. The relationship was investigated between the thickness of films and peak currents. When scanning number was over 60,peak currents were no longer increasing with the increase of film thickness. A good linearity was obtained between the peak currents and the square root of scanning rates. The peak currents were discussed with the thickness and scanning rate. Electrode process was controlled by diffusion. Electrochemical behavior of hydroquinone was investigated by using electrochemical impendence method. The diffusion coefficient was calculated by chronocoulometry. The electrode can be used to quickly detect hydroquinone.

关 键 词：对苯二酚 普鲁士蓝膜 电化学 

分 类 号：TQ2[化学工程—有机化工] O657.1[理学—分析化学]