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

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

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（Ｅ_ｓ）、脉冲高度（△Ｅ）、传递系数（α）对峰电流函数（ψｐ）、峰电流（ｉ_ｐ）、峰电位（Ｅ_ｐ）和半峰宽（Ｗ_（１／２））的影响．运用理论ψｐ－ｌｇｋ_ｓ图和单纯形优化计算测量了及Ｚｎ（Ⅱ）／Ｚｎ（Ｈｇ）－ＮａＮＯ３体系的Ｋ_ｓ及α值，结果与文献值一致。

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,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.