Investigation of Linear Sweep Voltammetry(Ⅰ)--The Equation of Quasi-Steady-State Reversible Wave at the Microdisk Electrode and Its Experimental Verification

Chem. J. Chinese Universities ›› 1991, Vol. 12 ›› Issue (10): 1312.

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Investigation of Linear Sweep Voltammetry(Ⅰ)--The Equation of Quasi-Steady-State Reversible Wave at the Microdisk Electrode and Its Experimental Verification

Zhang Zu-xun, Wang Xiao-ping, Wu Zhi-bin

Department of Chemistry, Nan jing University, Nanjing, 210008

Received:1990-05-21 Online:1991-10-24 Published:1991-10-24

Abstract

Abstract: An approximate expression for guasi-steady-state reversible wave at the microdisk electrode is derived in the following form. i = 4nFD_RT₀C_R^*∫(P)θ/(1+θ), where i is the current, D_Rthe diffusion coefficient, T₀the radius of the electrode, C_R^* the bulk concentration, P=(nFT₀²v/PTDR)^1/2 and θ=exp[nF(E-E⁰)/RT], the equation holds for P<1. In order to examine the validity of the equation, experimental studies with Fe(CN)₆^4-ions in 0. 5 mol/L KCl solution were carried out at the platinum disk (r₀=29. 9 μm) electrode. The experimental voltammograms are in good agreement with the theoretical ones.

Key words: Linear sweep voltammetry, Microdisk electrode, Quasi-steady-state reversible wave

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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.

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Investigation of Linear Sweep Voltammetry(Ⅰ)--The Equation of Quasi-Steady-State Reversible Wave at the Microdisk Electrode and Its Experimental Verification

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