The oxidation and reduction behavior of nitrite at carbon nanotube powder microelectrodes

被引：39

作者：

Zhao, YD ^{[1
]}

Zhang, WD

Luo, QM

Li, SFY

机构：

[1] Huazhong Univ Sci & Technol, Minist Educ, Key Lab Biomed Photon, Wuhan 430074, Peoples R China

[2] Inst Mat Res & Engn, Singapore 117602, Singapore

[3] Natl Univ Singapore, Dept Chem, Singapore 119260, Singapore

来源：

MICROCHEMICAL JOURNAL | 2003年 / 75卷 / 03期

关键词：

carbon nanotube; carbon nanotube sensor; nitrite; powder microelectrode; electrochemical sensor;

D O I：

10.1016/S0026-265X(03)00096-1

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Carbon nanotube electrodes were fabricated using powder microelectrode method, and the carbon nanotube powder microelectrodes (CNTPMEs) were characterized by the electro-oxidation and electro-reduction of nitrite. It was found that the kinetics of oxidation and reduction were greatly improved at CNTs compared with that at conventional graphite, indicating that CNTs could catalyze the electrochemical process of nitrite. The kinetic parameters of these process at CNTs were calculated, i.e. k was 0.593 cm s(-1), and (1-alpha)n(alpha) was 0.501+/-0.018 for the nitrite oxidation. This CNTPME was also used as a nitrite carbon nanotube sensor, and the results showed that the detection limit was 8 muM. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：189 / 198

页数：10

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