羟胺在碳纳米管修饰玻碳电极上的电催化还原及电化学动力学性质研究  

Electrocatalytic reduction of hydroxylamine at a carbon nanotube modified glassy carbon electrode and its electrochemical kinetics

作　　者：梁斌[1] 赵元弟[2] 高作宁[1] 

机构地区：[1]宁夏大学能源化工重点实验室化学化工学院,银川750021 [2]华中科技大学生命科学技术学院,武汉450074

出　　处：《分析试验室》2006年第9期14-17,共4页Chinese Journal of Analysis Laboratory

基　　金：教育部重点研究项目(204149);宁夏高等学校研究项目(210);宁夏大学自然科学基金(QN0510)资助项目

摘　　要：研究了羟胺在碳纳米管修饰玻碳电极(CNT/GC)上的电化学行为。研究结果表明,碳纳米管对羟胺的电化学行为有良好的电催化作用,在-0.62 V有一还原峰,是羟胺获得2个电子还原为铵所形成,同时测定了该电化学过程的动力学参数:电子转移数n为2,电子转移系数α为0.287,电极反应速率常数k为1.35×10-3cm/s。A carbon nanotube modified glassy carbon electrode （CNT/GCE） was used to study the electrochemical reduction of hydroxylamine （HMA）. It was found that the electrochemical behaviors were greatly improved at the CNT/ GCE, indicating that the cathode reduction could be catalyzed at the CNT/GCE. The kinetic parameters of this process were calculated, the heterogeneous electron transfer rate constant k was 0.0014 cm/s, a was 0.287, and electron transfer number was 2. Electrochemical reduction for HMA is a slow process and ammonia must be the product.

关 键 词：碳纳米管修饰电极 羟胺 电催化还原 电化学动力学 

分 类 号：O657.1[理学—分析化学]