Sensors 2011, 11(1), 19-31; doi:10.3390/s110100019
Article

Improving the Performance of Catalytic Combustion Type Methane Gas Sensors Using Nanostructure Elements Doped with Rare Earth Cocatalysts

1 Research Institution of Methane and Safety Monitoring Technology, China University of Mining and Technology, China 2 Faculty of Engineering and Applied Science, University of Ontario Institute of Technology, Oshawa, ON L1H 7K4, Canada
* Author to whom correspondence should be addressed.
Received: 11 November 2010; in revised form: 30 November 2010 / Accepted: 30 November 2010 / Published: 23 December 2010
(This article belongs to the Special Issue Gas Sensors - 2010)
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Abstract: Conventional methane gas sensors based on catalytic combustion have the drawbacks of high working temperature, low thermal stability and small measurement range. To improve their performance, cerium, which possesses high oxygen storage and release ability, was introduced via nanotechnology to prepare Ce-contained nanostructure elements. Three kinds of elements with different carriers: Al2O3, n-Al2O3 and n-Ce-Al2O3 were prepared and separately fabricated (Pt-Pd/Al, Pt-Pd/n-Al, Pt-Pd/n-Ce-Al). The performances of Wheatstone Bridges with three different catalytic elements were tested and compared. The results indicated that the cerium-containing element exhibited better performance than other elements regarding activity, anti-sulfur ability and thermal stability. Moreover, a constant temperature circuit was also applied in this system. The measurement range was extended from 4% to 10% by automatically decreasing the working current in a reasonable range. The maximum error for 0%–10% CH4 was controlled below 5%, which fully meets the measurement requirements.
Keywords: methane gas sensor; catalytic combustion; cerium; nanostructure elements

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MDPI and ACS Style

Wang, Y.; Tong, M.M.; Zhang, D.; Gao, Z. Improving the Performance of Catalytic Combustion Type Methane Gas Sensors Using Nanostructure Elements Doped with Rare Earth Cocatalysts. Sensors 2011, 11, 19-31.

AMA Style

Wang Y, Tong MM, Zhang D, Gao Z. Improving the Performance of Catalytic Combustion Type Methane Gas Sensors Using Nanostructure Elements Doped with Rare Earth Cocatalysts. Sensors. 2011; 11(1):19-31.

Chicago/Turabian Style

Wang, Ying; Tong, Min Ming; Zhang, Dan; Gao, Zhen. 2011. "Improving the Performance of Catalytic Combustion Type Methane Gas Sensors Using Nanostructure Elements Doped with Rare Earth Cocatalysts." Sensors 11, no. 1: 19-31.

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