摘要
研究了抗坏血酸在铂纳米粒子/碳纳米管/聚吡咯复合膜修饰电极上的电化学行为,发现复合修饰电极对抗坏血酸的电化学反应具有较好的电催化作用,与空白电极相比电化学氧化电流增加了7倍。用电化学阻抗谱研究了电子在修饰电极界面上的传输过程,发现修饰电极的电催化性能与修饰电极可以提高界面电子传输能力是相关的。同时研究了碳纳米管用量、支持电解质、扫速、电沉积条件等因素对抗坏血酸在修饰电极上电化学行为的影响。
The electrochemical behavior of ascorbic acid on platinum nanoparticles/carbon nanotubes/ polypyrrole composite modified glassy carbon electrode was studied.It was found that composite modified electrode exhibited a good electrocatalytic effect toward the electrochemical reaction of ascorbic acid and oxidation current of ascorbic acid by increasing 7-times compared with that at bare electrode.The electron transfer process through the modified electrode was investigated by electrochemical impedance spectroscopy.It was found the electrocatalytic behavior of the modified electrode is related to the charge transfer copability.Furthermore,several effects such as the amount of carbon nanotubes,supporting electrolytes,potential scan rate,electrochemical deposit conditions,which might influence electrochemical behavior of ascorbic acid at the modified electrode were also studied.
出处
《分析科学学报》
CAS
CSCD
北大核心
2012年第3期431-434,共4页
Journal of Analytical Science
基金
安徽省教育厅自然科学基金(No.KJ2011Z033)
关键词
聚吡咯
碳纳米管
铂纳米粒子
修饰电极
抗坏血酸
Polypyrrole
Carbon nanotube
Platinum nanoparticle
Modified electrode
Ascorbic acid
