摘要
用循环伏安法、计时电流法、计时库仑法和X射线先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在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。
The surface structure of glassy carbon electrode subjected to 'galvanostat' pretreat-
ment and its electrocatalytic behaviour in the presence of ascorbic acid, catechol and
hydroquinone were studied by means of cyclic voltammetry, chronoamperometry,
chronocoulometry and scanning electron microscopy. The electrocatalytic mechanism
was discussed, which was due to the adsorption and the catalysis of functional groups at
the electrode surface. Three separated peaks from the mixture of catecnol, hydroquinone
and ascorbic acid appeared on the electrochemically pretreated electrode which might be
useful for biochemical analysis of these compounds.
出处
《化学学报》
SCIE
CAS
CSCD
北大核心
1989年第9期866-872,共7页
Acta Chimica Sinica
