Electrocatalytic oxidation of cysteine at carbon nanotube powder microelectrode and its detection

被引：102

作者：

Zhao, YD

Zhang, WD

Chen, H

Luo, QM

机构：

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

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

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2003年 / 92卷 / 03期

基金：

中国国家自然科学基金;

关键词：

cysteine; electrocatalytic oxidation; carbon nanotube; carbon nanotube electrode;

D O I：

10.1016/S0925-4005(03)00312-5

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

The electrocatalytic oxidation of cysteine at carbon nanotube (CNT) was studied. It was found that the electrochemical behaviors of cysteine were greatly improved at CNTs, indicating that the anodic oxidation could be catalyzed at CNTs. The kinetics parameters of this process were calculated, the heterogeneous electron transfer rate constant k was 0.0042 cm s(-1), (1-alpha)n(alpha) was 0.30. The carbon nanotube powder microelectrodes (CNTPMEs) were also found with higher sensitivity for cysteine detection than other common electrodes, and 2 muM sample could be determined easily, indicating that it could be used as cysteine sensors. (C) 2003 Elsevier Science B.V. All rights reserved.

引用

页码：279 / 285

页数：7

共 33 条

[1] Preparation and characterization of rare earth orthovanadates for propane oxidative dehydrogenation [J].

Au, CT ;

Zhang, WD ;

Wan, HL .

CATALYSIS LETTERS, 1996, 37 (3-4) :241-246

[2]

Bard AJ, 1980, ELECTROCHEMICAL METH, P222

[3] Carbon nanotube electrode for oxidation of dopamine [J].

Britto, PJ ;

Santhanam, KSV ;

Ajayan, PM .

BIOELECTROCHEMISTRY AND BIOENERGETICS, 1996, 41 (01) :121-125

[4]

Britto PJ, 1999, ADV MATER, V11, P154, DOI 10.1002/(SICI)1521-4095(199902)11:2<154::AID-ADMA154>3.0.CO

[5]

2-B

[6] POWDER MICROELECTRODES [J].

CHA, CS ;

LI, CM ;

YANG, HX ;

LIU, PF .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1994, 368 (1-2) :47-54

[7] Reversible electrocatalytic reaction of sulfur oxoanions and sulfides by one catalyst of water-soluble cobalt porphyrin [J].

Chen, SM .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1997, 432 (1-2) :101-109

[8] Protein electrochemistry at carbon nanotube electrodes [J].

Davis, JJ ;

Coles, RJ ;

Hill, HAO .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1997, 440 (1-2) :279-282

[9] FARADAIC ELECTROCHEMISTRY AT MICRO-VOLTAMMETRIC ELECTRODES [J].

DAYTON, MA ;

BROWN, JC ;

STUTTS, KJ ;

WIGHTMAN, RM .

ANALYTICAL CHEMISTRY, 1980, 52 (06) :946-950

[10]

Downs C, 1999, ADV MATER, V11, P1028, DOI 10.1002/(SICI)1521-4095(199908)11:12<1028::AID-ADMA1028>3.0.CO

← 1 2 3 4 →