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

Chem. J. Chinese Universities ›› 1992, Vol. 13 ›› Issue (4): 454.

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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

Department of Chemistry, Nanjing University, Nanjing, 210008

Received:1991-06-04 Online:1992-04-24 Published:1992-04-24

Abstract

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(k_s) 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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WU Zhi-bin, ZHANG Zu-xun . Investigation of Linear Sweep Voltammetry(Ⅲ) ——The Theory of Quasi-Steady-State Current Controlled Simultaneously by Diffusion and Charge Transfer Rate at Ultramicrodisk Electrode[J]. Chem. J. Chinese Universities, 1992, 13(4): 454.

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[3]	WU Zhi-Bin, JIN Bao-Kang, GAO Shou-Guo, ZHANG Zu-Xun . Investigation on the Theory of Quasi-Steady-State Reversible Wave in Linear Sweep, Derivative and Semi-Differential Voltammetry at Ultramicroband Electrode [J]. Chem. J. Chinese Universities, 1993, 14(11): 1502.
[4]	JU Huang-xian, CHEN Hong-yuan, GAO Hong(H. Kao). Investigation on Microelectrodes (Ⅹ)——The Steady-State Differential Voltammetry on Microdisc Electrode [J]. Chem. J. Chinese Universities, 1992, 13(5): 586.
[5]	WU Zhi-bin, ZHANG Zu-xun . The General Equation of the Steady-State Voltammetric Curve at Ultramicrodisk Electrode——Mass Transfer Time Method [J]. Chem. J. Chinese Universities, 1992, 13(3): 315.
[6]	YU Jun-Sheng, ZHANG Zu-Xun . The Theory of Reversible Wave at Ultramicrodisk Electrodes in Staircase Sweep Voltammetry [J]. Chem. J. Chinese Universities, 1992, 13(10): 1229.
[7]	Zhang Zu-xun, Wang Xiao-ping, Wu Zhi-bin . Investigation of Linear Sweep Voltammetry(Ⅰ)--The Equation of Quasi-Steady-State Reversible Wave at the Microdisk Electrode and Its Experimental Verification [J]. Chem. J. Chinese Universities, 1991, 12(10): 1312.

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

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