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本文提出了超微盘电极上受扩散和电极反应速率控制的线性扫描伏安法准稳态电流理论,对电流、电位曲线的性质进行了探讨,利用铂超微盘电极及Fe(Ⅱ)-1mol/L H_2SO_4体系进行了验证,并测定了标准电极反应速率常数(k_s)及转移系数(α)。用恒电位和线性扫描伏安法得到的实验结果与理论相符。
In this paper, the quasi - steady - state current theory of linear sweep voltammetry is proposed, which is controlled by the diffusion and electrode reaction rate on the microdisk electrode. The properties of the current and potential curve are discussed. By using platinum ultra - disk electrode and Fe (Ⅱ) 1 mol / L H 2 SO 4 system was verified, and the standard electrode reaction rate constant (k_s) and transfer coefficient (α) were determined. The experimental results obtained by potentiostatic and linear sweep voltammetry are consistent with the theory.