线性扫描伏安法研究(Ⅰ)——微盘电极上准稳态可逆波方程式及其验证

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

本文报道微盘电极上线性扫描伏安法准稳态可逆波方程式,并成功地进行了验证,理论和实验结果十分符合。

An approximate expression for guasi-steady-state reversible wave at the microdisk electrode is derived in the following form. i = 4nFDRT0CR∫(P)θ/(1+θ), where i is the current, DR the diffusion coefficient, T0 the radius of the electrode, CR the bulk concentration, P=(nFr02v/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)64- 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.