Abstract
A mixed-potential type NO2 sensor based on stabilized-zirconia (YSZ) solid electrolyte and novel trirutile CoTa2O6 sensing electrode (SE) prepared through the sol-gel method was developed at high temperature. The effect of CoTa2O6 sensing electrode material calcinated at different temperatures on NO2 sensing property was mainly investigated and the device attached with CoTa2O6-SE sintered at 1000°C gave the highest response of 93mV to 100ppm NO2 and fast response and recovery times at 650°C. The response of the sensor utilizing CoTa2O6-SE annealed at 1000°C displayed segmentally linear relationship to the logarithm of NO2 concentration in the ranges of 0.5–5ppm and 5–500ppm, which the sensitivities were 12 and 80mV/decade, respectively. Meanwhile, the present fabricated device also showed good reproducibility, selectivity, long-term stability and slight effect of oxygen and moisture at 650°C. Furthermore, the mixed potential sensing mechanism proposed was discussed quantitatively and further verified by polarization curve measurement.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
