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Indexed by:期刊论文

Date of Publication:2013-07-31

Journal:SENSORS AND ACTUATORS B-CHEMICAL

Included Journals:SCIE、EI

Volume:184

Page Number:220-227

ISSN No.: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.