碳纳米管沉积铂修饰电极的制备和分析应用  

Preparation and analytical properties of a glassy carbon electrode modified with platinum-decorated carbon nanotubes.

作　　者：朱玉奴[1] 彭图治[1] 李建平[1] 

机构地区：[1]浙江大学化学系,浙江杭州310028

出　　处：《浙江大学学报（理学版）》2004年第3期300-305,共6页Journal of Zhejiang University（Science Edition）

基　　金：国家自然科学基金资助项目(29975024);国家自然科学基金资助项目(20275034);浙江省科技计划项目(2003C21024).

摘　　要：制作了碳纳米管沉积铂修饰玻碳电极(CNT-Pt/GCE),以半胱氨酸为样品研究了该修饰电极的分析性能.该电极在硫酸溶液中具有显著电催化氧化作用,当pH值小于2时,CNT-Pt/GCE在0.55V左右得到半胱氨酸的氧化峰,峰电位比Pt电极(0.7V)负移,而且峰电流密度明显增加,大约是Pt电极的3倍.研究了多种实验条件对峰电流的影响,并探讨了半胱氨酸在CNT-Pt/GCE上的催化氧化机理.结果表明,CNT-Pt/GCE具有优良的分析性能,有可能为提高电化学分析灵敏度做出贡献.A glassy carbon electrode modified with platinum-decorated carbon nanotubes (CNT-Pt/GCE) was prepared. The analytical properties of the electrode were studied in determining a sample of cysteine. The CNT-Pt/GCE showed highly catalytic activity for electro-oxidation in hydrogen sulfate solution (pH≤2). The peak potential is moved negatively from 0.7 V to 0.55 V comparing with a normal Pt electrode, and the peak current at CNT-Pt/GCE is three times of that at Pt electrode. The effect of experimental conditions on peak current was examined and the electrocatalytic oxidation mechanism of cysteine at CNT-Pt/GCE was explored. The CNT-Pt/GCE showed excellent analytical properties in the experiment. It is possible to improve the sensitivity in electroanalysis at CNT-Pt/GCE.

关 键 词：碳纳米管 纳米铂 半胱氨酸 铂修饰电极 制备 

分 类 号：O646.54[理学—物理化学] TB383[理学—化学]