高等学校化学学报

高等学校化学学报 ›› 1992, Vol. 13 ›› Issue (4): 454.

• 论文 • 上一篇    下一篇

线性扫描伏安法研究(Ⅲ)——超微盘电极上同时受扩散和电极反应速率控制的准稳态电流理论

吴志斌, 张祖训   

  1. 南京大学化学系, 南京, 210008
  • 收稿日期:1991-06-04 出版日期:1992-04-24 发布日期:1992-04-24
  • 通讯作者: 张祖训
  • 基金资助:

    高等学校博士学科点专项科研基金

Investigation of Linear Sweep Voltammetry(Ⅲ) ——The Theory of Quasi-Steady-State Current Controlled Simultaneously by Diffusion and Charge Transfer Rate at Ultramicrodisk Electrode

WU Zhi-bin, ZHANG Zu-xun   

  1. Department of Chemistry, Nanjing University, Nanjing, 210008
  • Received:1991-06-04 Online:1992-04-24 Published:1992-04-24

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摘要： 本文提出了超微盘电极上受扩散和电极反应速率控制的线性扫描伏安法准稳态电流理论,对电流、电位曲线的性质进行了探讨,利用铂超微盘电极及Fe(Ⅱ)-1mol/LH2SO4体系进行了验证,并测定了标准电极反应速率常数(ks)及转移系数(α)。用恒电位和线性扫描伏安法得到的实验结果与理论相符。

关键词: 超微盘电极, 准可逆波理论, 线性扫描伏安法

Abstract: In this paper, the theory of quasi-steady-state current controlled simultaneously by diffusion and charge transfer rate at an ultramicrodisk electrode is described.The behaviours of current-potential curves are discussed and the methods for the determination of heterogeneous rate constant(ks) and transfer coefficient (a) from experimental results are reported.Experiments were carried out on platinum ultramicrodisk electrode to verify the theory.The experimental data of constant potential and linear sweep voltammetry are in good agreement with theoretical values for the oxidation of Fe(Ⅱ) in 1.0 mol/L H2SO4 solution.

Key words: Ultramicrodisk electrode, Theory of quasi-reversible wave, Linear sweep voltammetry

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