摘要
本文提出了超微盘电极上线性扫描伏安法催化电流理论及恒电位催化电流方程式,证实在k<sub>f</sub>c<sub>2</sub><sup>值</sup>足够大的条件下,两种方法具有相同的电流-电位方程式。对理论进行了验证,测定了亚铁氰化钾-氨基比林-氢氧化钾体系的化学反应速率常数(k<sub>f</sub>)。
In this paper, the equations for eatalytio wave at ultramicrodisk alectrode with linear sweep voltammetry and constant potential voltammetry are derived. It is shown that when k_fc_z~* (where k_f is the rate constant for the chemical reaction, c_z~* is the concentration of catalyst) is larger, the same current-potential relations can be obtained,Experiments were carried out on platinum ultramiorodisk electrode to verify the theory. Theoretical conelusions are in good agreement with experimental data for the oxidation of K_4Fe(CN)_6 in amidopyrine-KOH solution. The rate oonstant for catalytio reaetion (k_f) is also determined.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
1992年第3期274-280,共7页
Acta Chimica Sinica
基金
高等学校博士学科点专项科研基金