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

Chem. J. Chinese Universities ›› 1994, Vol. 15 ›› Issue (6): 813.

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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. 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

Abstract

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(E_s), pulse height(△E), transfer coefficient(α), on the peak current function(ψ_p), peak current(i_p), peak potential(E_p)and half-width(W_1/2)have been discussed.According to theoretical, vs -lgks and Simplex Optimization caculations, the kinetic parameters, k_s, 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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PANG Yu-ZH, LIU Xin-Yu, TONG Wei, JIN Li-Tong. The Study of Normal Dual Pulse Superimposed Four Potential Step Differential Voltammetry─Theory of Quasi-Reversible Electrode Processes andExperimental Verifications[J]. Chem. J. Chinese Universities, 1994, 15(6): 813.

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

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