5-(3,5-二溴-2-吡啶偶氮)-2,4-二氨基甲苯在汞电极上的吸附还原机理研究  

A study on the Adsorptive Reduction Mechanism of 5-(3,5-dibromo-2-pryridylazo)-2,4-Diamino-toluene

作　　者：徐素君[1] 施清照[1] 吕荣山[1] 朱岩[1] 

机构地区：[1]杭州大学化学系

出　　处：《杭州大学学报（自然科学版）》1993年第4期449-454,共6页Journal of Hangzhou University Natural Science Edition

摘　　要：本文利用差分脉冲极谱法、常规脉冲极谱法、循环伏安法等电化学方法研究了5-(3,5-二溴-2-吡啶偶氮)-2,4-二氨基甲苯[3,5-diBr-PADAT]在汞电极上的吸附伏安行为,电极还原反应机理。发现在碱性介质中,该试剂在电极上发生2电子的可逆反应;确定了该试剂在汞电极上的吸附等温线模式,并测定了电极反应速率常数k_s值。Adsorplive voltammetry behaviour and reduction mechanism of 3,5-diBr-PADAT was investigated at the hanging mercury electrode by differential pulse polarography, normal pulse polarography and cyclic voltammetry etc. In basic medium (pH 12. 0), the electrode process of reagent is reversible two-electrons processes, It was demonstrated that the adsorption of 3,5-diBr-PADAT obeys Frumkin adsorption isotherm, and the reaction rate ks was determined .

关 键 词：吸附伏安法 偶氮试剂 汞电极 吸附 

分 类 号：O657.1[理学—分析化学]