Electrochemical acetylene sensor based on Au/MWCNTs

被引：35

作者：

Li, Cuiling ^{[1
]}

Su, Yi ^{[1
]}

Lv, Xiangyu ^{[1
]}

Xia, Hailong ^{[2
]}

Wang, Yujiang ^{[1
]}

机构：

[1] Chinese Acad Sci, Changchun Inst Appl Chem, Grad Sch, Changchun 130022, Peoples R China

[2] Rush Univ, Med Ctr, Chicago, IL 60612 USA

来源：

SENSORS AND ACTUATORS B-CHEMICAL | 2010年 / 149卷 / 02期

关键词：

Acetylene; Gas sensor; MWCNTs; Au/MWCNTs catalysts; Au catalysts; MULTIWALLED CARBON NANOTUBES; GOLD; ELECTRODES; ELECTROOXIDATION; NANOPARTICLES; OXIDATION; ELECTROCATALYSTS; POLYMERIZATION; NANOCOMPOSITE; ADSORPTION;

D O I：

10.1016/j.snb.2010.05.011

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Gold nanoparticles supported on multi-walled carbon nanotubes (Au/MWCNTs) were prepared as electrocatalysts for an electrochemical sensor of acetylene. The catalysts were characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). The electrochemical experiments showed that the catalysts exhibited a distinctly higher activity for the acetylene electro-oxidation than Au-NPs and Au/C catalysts. In typical cyclic voltammograms, the onset potential of Au/MWCNTs for the acetylene oxidation is 0.73 V. which is 0.19 V more negative than that of Au-NPs. The acetylene sensor test showed good linear response towards acetylene concentration in a wide range from 10 ppm to 50 ppm with a steady response current for 300 s, good sensitivity of 80 nA/ppm and fast 90% response time (t(90)) of 25 s to 50 ppm acetylene. All the results indicate a good potential application of this sensor in the detection of acetylene. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：427 / 431

页数：5

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