线性扫描伏安法研究 Ⅱ.超微盘电极上催化电流理论  

Investigation on Linear Sweep Voltammetry Ⅱ The Theory of Catalytic Current at Ultramicrodisk Electrode

作　　者：吴志斌[1] 张祖训[1] 

机构地区：[1]南京大学化学系,南京210008

出　　处：《化学学报》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

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_fc₂^值足够大的条件下,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_f）。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.

关 键 词：伏安法 超微盘电极 催化电流理论 

分 类 号：O657.14[理学—分析化学]