High-temperature hydrogen sensor based on stabilized zirconia and metal oxide electrode
- Kyushu Univ., Fukuoka (Japan)
It has been reported that stabilized-zirconia oxygen sensors sometimes give non-Nernstian response when oxidizable gases, such as CO and H{sub 2}, coexist with O{sub 2}. Such behavior is usually observed at low temperature below 400{degrees}C when Pt is used as a sensing electrode, and the sensing electrode potential involved is mixed potential. Recently, it was found that a small amount of H{sub 2}S or NO{sub x} existing in air could be detected by a zirconia-based sensor attached with an oxide electrode, such as WO{sub 3} or CdMn{sub 2}O{sub 4}, through mechanisms involving mixed potential. These results suggest the importance of oxide electrodes for the mixed-potential type gas sensors. On this background, the authors have carried out a search for the electrode oxides adequate for detecting oxidizable gases at high temperature. As a result, ZnO was found to work as an excellent electrode for selective H{sub 2} monitoring, as described below.
- OSTI ID:
- 441264
- Report Number(s):
- CONF-960782-; TRN: 96:006557-0035
- Resource Relation:
- Conference: 6. international meeting on chemical sensors, Gaithersburg, MD (United States), 22-25 Jul 1996; Other Information: PBD: 1996; Related Information: Is Part Of The 6th international meeting on chemical sensors; PB: 313 p.
- Country of Publication:
- United States
- Language:
- English
Similar Records
MULTIFUNCTIONAL (NOx/CO/O2) SOLID-STATE SENSORS FOR COAL COMBUSTION CONTROL
MULTIFUNCTIONAL (NOx/CO/O2) SOLID-STATE SENSORS FOR COAL COMBUSTION CONTROL