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Indexed by:期刊论文

Date of Publication:2016-02-01

Journal:SENSORS AND ACTUATORS B-CHEMICAL

Included Journals:SCIE、EI

Volume:223

Page Number:365-371

ISSN No.:0925-4005

Key Words:Mixed potential gas sensors; YSZ; CdWO4 electrode; Hydrogen sensors

Abstract:The yttria-stabilized cubic zirconia (YSZ) based potentiometric sensor coupled with CdWO4 as the sensing electrode was developed for hydrogen detection. The developed CdWO4/YSZIPt sensor has found significant response to different concentration of hydrogen from 0.5 vol% to 3 vol% at 500 degrees C. The sensor showed good selectivity to several possible interferents such as CO, NO2 and C3H8 when the concentrations are less than 1500 ppm. The dc polarization curves and ac impedance spectra of the sensor were measured to study the sensing mechanism. The mixed-potential theory was confirmed to explain the sensing results. The reproducibility and signal repeatability of the sensor was examined to test the reliability of the sensor. The possible influence of oxygen variation and humidity in the background on the sensor response was also studied. (C) 2015 Elsevier By. All rights reserved.