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Materials and Manufacturing Processes Volume 25, 2010 - Issue 5: Surface Engineering
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Original Articles

CO Sensing Property of Transition Metal Oxide-Loaded SnO2 in a Reducing Atmosphere

Hiroyuki Yamaura Department of Materials Science and Biotechnology, Graduate School of Science and Engineering, Ehime University, Matsuyama, JapanCorrespondence[email protected]
,
Mari Nakaoka Department of Materials Science and Biotechnology, Graduate School of Science and Engineering, Ehime University, Matsuyama, Japan
,
Shinsuke Hirao Department of Materials Science and Biotechnology, Graduate School of Science and Engineering, Ehime University, Matsuyama, Japan
,
Akihiro Fujiwara Department of Materials Science and Biotechnology, Graduate School of Science and Engineering, Ehime University, Matsuyama, Japan
&
Hidenori Yahiro Department of Materials Science and Biotechnology, Graduate School of Science and Engineering, Ehime University, Matsuyama, Japan
Pages 350-353 | Received 10 Oct 2008, Accepted 27 Mar 2009, Published online: 26 May 2010
 
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Abstract

CO sensing properties of various transition metal oxide-loaded SnO2 sensors were investigated in a reducing atmosphere such as wet H2 gas. Among transition metal oxide-loaded SnO2 sensors used in the present study, CuO-loaded SnO2 sensor exhibited the highest sensor response to 1% CO in wet 50% H2 at around 150°C, while it showed no sensor response in dry 50% H2. From X-ray diffraction (XRD) analysis, CuO was reduced to metallic Cu in a reducing atmosphere at above 150°C. H2-temperature-programmed reduction (H2-TPR) and diffuse reflectance Fourier transform infrared (DRIFT-IR) spectroscopy measurements were carried out to discuss the sensor response mechanism.

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