Electrochemical acetylene sensor based on Au/MWCNTs
作者： Cuiling Li , Yi Su , Xiangyu Lv , Hailong Xia , Yujiang Wang
DOI: 10.1016/J.SNB.2010.05.011
关键词: Transmission electron microscopy 、 Carbon nanotube 、 Nanoparticle 、 Analytical chemistry 、 Nuclear chemistry 、 Electrochemical gas sensor 、 X-ray photoelectron spectroscopy 、 Materials science 、 Acetylene 、 Electrochemistry 、 Catalysis
摘要: Gold nanoparticles supported on multi-walled carbon nanotubes (Au/MWCNTs) were prepared as electrocatalysts for an electrochemical sensor of acetylene. The catalysts characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD) and photoelectron spectroscopy (XPS). experiments showed that the exhibited a distinctly higher activity acetylene electro-oxidation than Au-NPs Au/C catalysts. In typical cyclic voltammograms, onset potential Au/MWCNTs oxidation is 0.73 V. which 0.19 V more negative Au-NPs. test good linear response towards concentration in wide range from 10 ppm to 50 with steady current 300 s, sensitivity 80 nA/ppm fast 90% time (t(90)) 25 s All results indicate application this detection (C) 2010 Elsevier B.V. rights reserved.
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