Methane sensor based on palladium/MWNT nanocomposites

Methane gas sensor was fabricated based on electrocatalytic properties of the Pd/MWNT nanocomposites on indium tin oxide (ITO) glass substrates. A linear response for methane was obtained in the range of 0–16% (v/v) with a detection limit of 0.167% (v/v) and R.S.D. of 4.1%. After 100 times sensing o...

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Bibliographic Details
Published in:Chinese chemical letters 2009-05, Vol.20 (5), p.608-610
Main Authors: Li, Zhong Ping, Guo, Yong, Wu, Suo Zhu, Shuang, Shao Min, Dong, Chuan
Format: Article
Language:English
Subjects:
Electrocatalysis
Gas sensor
Methane
Palladium/MWNTs
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Summary:Methane gas sensor was fabricated based on electrocatalytic properties of the Pd/MWNT nanocomposites on indium tin oxide (ITO) glass substrates. A linear response for methane was obtained in the range of 0–16% (v/v) with a detection limit of 0.167% (v/v) and R.S.D. of 4.1%. After 100 times sensing or stable stored more than 12 months in atmosphere, unconspicuous measurable decrease was observed. The response time was less than 60 s at room temperature and ambient pressure. Some common potential interferents in samples such as N 2, CO, CO 2, ethane, propane, pentane, methanol, ethanol, H 2 and NH 3 were investigated and all the effects were less than 5% on the response for 3.0% (v/v) methane. The sensor was applied to methane determinations in man-made gas samples, the results are satisfied.
ISSN:1001-8417
1878-5964
DOI:10.1016/j.cclet.2008.12.031