Release Time:2019-10-22  Hits:

Indexed by: Journal Article

Date of Publication: 2013-07-31

Journal: SENSORS AND ACTUATORS B-CHEMICAL

Included Journals: EI、SCIE

Volume: 184

Page Number: 220-227

ISSN: 0925-4005

Key Words: Mixed potential gas sensor; Zn2SnO4 + SnO2; ZnCo2O4; Carbon monoxide; Propane

Abstract: The sensing performance of the Zn-Sn-O and ZnCo2O4 oxide electrodes to carbon monoxide and propane at 600 degrees C was investigated. The planar-type mixed-potential sensor coupled with Zn2SnO4 + SnO2 as sensing electrode indicated a linear relationship between the responses of the sensor and the logarithm of CO concentrations within a range from 60 ppm to 1500 ppm. The sensor showed good signal reproducibility at 600 degrees C while some interference from NO2 and C3H8 were also observed. On the other hand, the sensor using the ZnCo2O4 sensing electrode indicated a higher response to propane and excellent selectivity to NO2 and CO at 600 degrees C. These two new sensing electrodes demonstrated a significant potential to be employed for the selective mixed-potential CO/C3H8 sensors for online monitoring automobile gas emissions. (C) 2013 Elsevier B. V. All rights reserved.