Zirconia-based potentiometric sensor using a pair of oxide electrodes for selective detection of carbon monoxide
- Kyushu Univ., Kasuga, Fukuoka (Japan). Dept. of Materials Science and Technology
A high-performance solid-state compact gas sensor to detect CO has been needed for monitoring and controlling the combustion condition of gas appliances. By using a pair of oxide electrodes, a stabilized-zirconia-based sensor was developed for selective detection of CO at high temperature. Among the oxide pair examined, the combination of CdO and SnO{sub 2} was best suited for the electrode couple, giving quick and selective response to CO in air at 600 C. The 90% response and the 90% recovery times of the sensor to 200 ppm CO was as short as ca. 8 and 10 s, respectively, at 600 C. The EMF value was linearly related with the logarithm of CO concentration in the range of 20 to 4,000 ppm. Moreover, the cross-sensitivities to other gases, such as H{sub 2}, NO, NO{sub 2}, CO{sub 2}, O{sub 2}, and H{sub 2}O, were small or insignificant.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 533103
- Journal Information:
- Journal of the Electrochemical Society, Vol. 144, Issue 7; Other Information: PBD: Jul 1997
- Country of Publication:
- United States
- Language:
- English
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