微电极研究——Ⅶ.微盘电极的传质速率研究  

Investigation on Microelectrodes——Ⅶ. Study of Mass Transfer Rate on Microdisk Electrode

作　　者：陈洪渊[1] 鞠熀先[1] 

机构地区：[1]南京大学化学系,南京210008

出　　处：《分析化学》1992年第9期997-1001,共5页Chinese Journal of Analytical Chemistry

基　　金：国家自然科学基金

摘　　要：用单电位阶跃和循环伏安法研究了微盘电极的边缘效应。建立了以常规旋转圆盘电极为参比γ的等传质的动力学模型,即在半径为r的微盘电极上的传质速率和电流密度与4.22D^(2/3)γ^(1/3)r^(-2)rad/min的旋转圆盘电极相当,为各种电极传质性能的比较提供了依据,并为实验所证实。The edge effect of microdisk electrode was studied by single potential step method and cyclic voltammetry. The kinetic model of equal mass transfer using the usual rotating disk electrode as reference was established, i. e., the mass transfer coefficient and current density at a microdisk eletrode with a radius of r are corresponding to those at a rotating disk electrode with a rotating rate v ω of 4.22D^2/~3v^1/~3/r^2 rad/s. It offers the objective criteria for the comparison of mass transfer behaviour of various electrodes, and has been experimentally verified.

关 键 词：微电极 微盘电极 边缘效应 传质 

分 类 号：O657.1[理学—分析化学]