高等学校化学学报 ›› 1994, Vol. 15 ›› Issue (6): 813.

• 论文 • 上一篇    下一篇

常规二脉冲叠加四阶跃微分伏安法研究─准可逆电极过程的理论和验证

方禹之1, 刘新宇2, 仝威2, 金利通2   

  1. 1. 华东师范大学化学系, 上海, 200062;
    2. 中国科学院长春应用化学研究所电分析开放实验室
  • 收稿日期:1993-06-21 修回日期:1993-11-01 出版日期:1994-06-24 发布日期:1994-06-24
  • 通讯作者: 方禹之.男,62岁,教授.
  • 作者简介:方禹之.男,62岁,教授.
  • 基金资助:

    中国科学院长春应用化学研究所电分析化学开放实验室资助

The Study of Normal Dual Pulse Superimposed Four Potential Step Differential Voltammetry─Theory of Quasi-Reversible Electrode Processes andExperimental Verifications

PANG Yu-ZH1, LIU Xin-Yu2, TONG Wei2, JIN Li-Tong2   

  1. 1. Department of Chemistry, East China Normal University, Shanghai, 200062;
    2. Laboratory of Electroanalytical Chemistry, Changchun Institutde of Applied Chemistry, Chinese Academy of Sciences, Changchun
  • Received:1993-06-21 Revised:1993-11-01 Online:1994-06-24 Published:1994-06-24

摘要: 推导并验证了新型阶跃伏安技术─常规二脉冲叠加四阶跃微分伏安法准可逆电极过程的理论电流方程式,同时研究了各项参数如扫描增量(Es)、脉冲高度(△E)、传递系数(α)对峰电流函数(ψp)、峰电流(ip)、峰电位(Ep)和半峰宽(W1/2)的影响。运用理论ψp-lgks图和单纯形优化计算测量了及Zn(Ⅱ)/Zn(Hg)-NaNO3体系的Ks及α值,结果与文献值一致。

关键词: 伏安法, 脉冲, 准可逆电极过程, 电流理论

Abstract: The mathematical expression of current functions of the new pulsed volatmmetric technique:normal dual pulse superimposed four potential step differential voltammetry, proposed by the authors, for quasi-reversible electrode processes have been deduced and verified by experiments, The effects of parameters, such as scan increment(Es), pulse height(△E), transfer coefficient(α), on the peak current function(ψp), peak current(ip), peak potential(Ep)and half-width(W1/2)have been discussed.According to theoretical, vs -lgks and Simplex Optimization caculations, the kinetic parameters, ks, αfor/Fe-KCl system at glassy carbon electrode and Zn(Ⅱ)/Zn(Hg)-NaNO3 system at static mercury electrode have been determined.The results are in agreement with the literature values.

Key words: Voltammetry, Pulse, Quasi-reversible electrode process, Current theory

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