Nanosized perovskite oxide NdFeO 3 as material for a carbon-monoxide catalytic gas sensor

Abstract In this paper, research on a CO catalytic gas sensor based on nano-crystalline perovskite oxide NdFeO 3 designed for exhaust gas measurement is presented. Nano-crystalline oxide NdFeO 3 was synthesized by a sol–gel citrate technique. The gas sensing characteristics of this sensor were investigated in the concentration range of CO between 0 and 5 vol.% in air. The influences of C 3 H 8 , C 4 H 16 gases, relative humidity and air-flow rate on the cross-sensitivity of the CO sensor were also studied.