Nanosized perovskite oxide NdFeO3 as material for a carbon-monoxide catalytic gas sensor

Truong Giang Ho, Thai Duy Ha, Quang Ngan Pham, Hong Thai Giang, Thi Anh Thu Do and Ngoc Toan Nguyen

Abstract

In this paper, research on a CO catalytic gas sensor based on nano-crystalline perovskite oxide NdFeO₃ designed for exhaust gas measurement is presented. Nano-crystalline oxide NdFeO₃ 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 C₃H₈, C₄H₁₆ gases, relative humidity and air-flow rate on the cross-sensitivity of the CO sensor were also studied