کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
751196 | 895206 | 2010 | 5 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Electrochemical acetylene sensor based on Au/MWCNTs Electrochemical acetylene sensor based on Au/MWCNTs](/preview/png/751196.png)
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 (t90) of 25 s to 50 ppm acetylene. All the results indicate a good potential application of this sensor in the detection of acetylene.
Journal: Sensors and Actuators B: Chemical - Volume 149, Issue 2, 19 August 2010, Pages 427–431