Selective CO Detection Using YSZ-based Sensor with a Combination of CuCrFeO4 and CoCrFeO4 Electrodes

Abstract

A solid-state potentiometric sensor using yttria-stabilized zirconia (YSZ) as a solid electrolyte and oxide electrodes has been developed for selective CO detection. At 450oC, the YSZ-based sensor using CuCrFeO4 sensing-electrode (SE) was found to have similar gas sensing characteristic with the sensor using CoCrFeO4-SE, except toward CO. When both SEs was paired on a YSZ tube, the responses to various gases except for CO could be cancelled out for the resulting combined-SEs sensor. Thus, this sensor could generate a sensitive and selective response to CO at 450oC even under humid conditions.