电化学预处理玻炭电极上的电催化

用循环伏安法、计时电流法、计时库仑法和X射线光电子能谱法研究了恒电流法电化学预处理玻炭电极上的表面性质及其对抗坏血酸、儿茶酚和对苯二酚的电催化效应。讨论了电催化机理, 证明电极表面吸附及表面功能团的催化是发生电催化的主要原因。儿茶酚、对苯二酚和抗坏血酸的混合物的预处理电极上的波峰明显分开, 有可能应用于儿茶酚和抗坏血酸的同时测定。

Electrocatalysis on electrochemically pretreated glassy carbon electrode

The surface structure of glassy C electrode subjected to "galvanostat" pretreatment and its electrocatalytic behavior in the presence of ascorbic acid, catechol and hydroquinone were studied by means of cyclic voltammetry, chronoamperometry, chronocoulometry and SEM. The electrocatalytic mechanism is discussed, which was due to the adsorption and the catalysis of functional groups at the electrode surface. Three separated peaks from the mixture of catechol, hydroquinone and ascorbic acid appeared on the electrochem. pretreated electrode which might be useful for biochem. anal. of these compounds