大学化学 >> 2021, Vol. 36 >> Issue (4): 2005071.doi: 10.3866/PKU.DXHX202005071

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线性扫描伏安法的基本原理与伏安图解析

胡成国(), 华雨彤   

  • 收稿日期:2020-05-27 录用日期:2020-07-08 发布日期:2020-07-13
  • 通讯作者: 胡成国 E-mail:cghu@whu.edu.cn
  • 作者简介:胡成国, cghu@whu.edu.cn

Principles of Linear Sweep Voltammetry and Interpretations of Voltammograms

Chengguo Hu(), Yutong Hua   

  • Received:2020-05-27 Accepted:2020-07-08 Published:2020-07-13
  • Contact: Chengguo Hu E-mail:cghu@whu.edu.cn

摘要:

从线性扫描伏安法的定义和原理出发,通过考察伏安测试的装置和电极反应过程,推测出影响线性扫描伏安图形状的基本要素,即电极反应过程中的异相电子转移与液相传质之间的物质“供求关系”,决定了线性扫描伏安图的形状特征。在此基础上,结合一系列不同电化学测试条件下的伏安行为,如常规电极与超微电极、可逆与不可逆电极过程、静止电极与旋转圆盘电极以及电催化等,阐述了该“供求关系”对伏安图形状影响的基本规律,为理解线性扫描伏安法的基本原理和数据解析提供参考。

关键词: 线性扫描伏安法原理, 电极反应过程, 伏安图解析, 常规与超微电极, 可逆性, 旋转圆盘电极, 电催化反应

Abstract:

In this paper, we discussed the basic elements which affect the shape of linear sweep voltammograms in the reaction process on the electrode surface, that is, heterogeneous electron transfer and mass transfer in liquid phase. Derived from the basic definition and principle of voltammetry, the "supply-demand" mode between electron and mass transfer determines the characteristics of voltammograms. A series of voltammetric behaviors under different electrochemical testing conditions were discussed, including conventional electrodes and microelectrodes, reversible and irreversible electrode processes, stationary and rotating disk electrodes, and electrocatalysis. The basic laws that affect the shape of voltammograms provide a reference for understanding the fundamental principles of linear sweep voltammetry and data analysis.

Key words: Principle of linear sweep voltammetry, Electrode reaction process, Interpretation of voltammograms, Macro-and ultramicro-electrodes, Reversibility, Rotating disk electrode, Electrocatalytic reaction

MSC2000: 

  • G64