Performance of a carbon monoxide sensor based on zirconia-doped ceria

Abstract

a b s t r a c tResistive-type carbon monoxide sensors were fabricated using zirconia-doped ceria, and their sensing properties were evaluated and compared with equivalent devices based on non-doped ceria. The response of both sensor types was found to increase with decreasing temperature, while the response at 450 • C of a sensor fired at 950 • C was greater than that of a sensor fired at 1100 • C. When fired at 950 • C, however, the response at 450 • C of a sensor created using zirconia-doped ceria was slightly less than that of a sensor constructed from non-doped ceria. Multivariate analysis confirmed that the response of both sensor types is proportional to the resistance raised to the power of about 0.5, and inversely proportional to the particle size raised to a power of about 0.8. The sensor response time can be considered almost the same regardless of whether zirconia doping is used or not.

Selective Discrimination between CO and H2 with Copper–Ceria-Resistive Gas Sensors

“…Ortega et al synthesized ceria particles decorated with Eu and La ({Eu,La}/Ce up to 8.5%) and observed an improved sensor response to CO . Similar findings were obtained by Izu et al for zirconia-modified ceria. , Amoresi et al investigated the impact of the sample morphology in Ni 2 O 3 -decorated ceria nanostructures on the CO gas-sensing performance …”

“…38 Ortega et al synthesized ceria particles decorated with Eu and La ({Eu,La}/Ce up to 8.5%) and observed an improved sensor response to CO. 39 Similar findings were obtained by Izu et al for zirconiamodified ceria. 40,41 Amoresi et al investigated the impact of the sample morphology in Ni 2 O 3 -decorated ceria nanostructures on the CO gas-sensing performance. 42 For surface-chemical reactions such as the ones occurring in gas-sensing or heterogeneous catalysis, large specific surface areas of the active material are obviously desirable if not compulsory.…”

An Overview of Solid Fuel Processing, Kinetics, and the Advances in Minimizing Carbon Monoxide Emissions

“…(Zhu et al, 2015) realized that PdO powder & α-terpineol as working electrode and Pt as a counter electrode with yttria-stabilized zirconia could be a good combination for detection of CO. They observed that 20-200 ppm of CO could be detected in 118 seconds at 450 o C. In 2016, (Izu et al, 2016) used Pt for both working and counter electrodes with zirconia-doped ceria (Ce0.9Zr0.1O2) as the electrolyte and observed that 1000-5000 ppm of CO could be detected in 2-4 seconds at 400-500 o C. In the same year, (Shimizu et al, 2016) used Au/SnO2 as working electrode and Au as a counter electrode with anion-conducting polymer as the electrolyte for a CO sensor. They observed that 10-3000 ppm of CO could be detected in14-300 seconds at 30 o C. All these developments show a remarkable stride in improving the detection of CO with electrochemical sensors.…”

Potentiometric CO sensors using anion-conducting polymer electrolyte: Effects of the kinds of noble metal-loaded metal oxides as sensing-electrode materials on CO-sensing properties

“…However, we cannot detect CO, which is odorless and colorless, by ourselves, and thus highly sensitive and selective CO sensors are quite essential in detecting even a low concentration of CO quickly and accurately, and then in preventing inhalation of CO into lung through the respiratory system. Among various types of CO sensors [2][3][4][5][6], electrochemical gas sensors using cation-conducting polymer (such as Nafion ® ) as an electrolyte material, which can be operated at RT, have also been attractive as a high performance CO sensor [7][8][9][10][11][12][13], and some types of electrochemical CO sensors are presently commercialized all over the world [14]. On the other hand, anion-conducting polymers (ACP) with large OH − conductivity and improved long-term stability [15][16][17] are also quite attractive as an electrolyte material alternative to cation-conducting polymers, because most of metal oxides are relatively stable in alkaline media.…”

“…These results obviously show that such metal-oxide-based materials have substantial advantage in the CO-sensing properties (especially, the CO selectivity against H2), as a CO-sensing electrode substrate of potentiometric gas sensors, in comparison with carbon-black-based materials. 4 Therefore, we have attempted to find promising metal oxides loaded with noble metal as a highly sensitive and selective CO-sensing electrode material of potentiometric gas sensors in this study. First, we have discussed effects of the kind of metal oxide (Bi2O3, CeO2, In2O3, SnO2, or V2O5) as a base material of the sensing electrode on the CO-sensing properties of the ACPbased sensors.…”