The response of CeO2 to H2S has been investigated by an alternating current (AC) impedance analysis. The AC impedance analysis can divide whole impedance, i.e., identical with direct current resistance, to three type contributions, bulk, grain boundary, and electrode interface. In a case of CeO2, the bulk contribution is the main component of the whole impedance because of clear grain boundary, which is observed by a transmission electron microscope observation. Sensor responses are defined as the quotient of sensor resistance in no odor air and sensor resistance in odor. The sensor responses of bulk contribution are almost identical with those of whole impedance.
- AC impedance analysis
- Cerium oxide
- Hydrogen sulfide
- Odor sensor
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics
- Electrical and Electronic Engineering