摘要
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 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(ks) 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.
出处
《高等学校化学学报》
SCIE
EI
CAS
CSCD
北大核心
1992年第4期454-458,共5页
Chemical Journal of Chinese Universities
基金
高等学校博士学科点专项科研基金
关键词
超微盘电极
准可逆波理论
伏安法
Ultramicrodisk electrode,Theory of quasi-reversible wave,Linear sweep voltammetry
