TY - JOUR
T1 - A stable solid-reference electrode of BiCuVOx/perovskite-oxide for potentiometric solid electrolyte CO2 sensor
AU - Kishi, Shotaro
AU - Yuasa, Masayoshi
AU - Kida, Tetsuya
AU - Lantto, Vilho Eelis
AU - Shimanoe, Kengo
AU - Yamazoe, Noboru
PY - 2007/11
Y1 - 2007/11
N2 - A laminated solid-reference electrode of BiCuVOx (Bi 2Cu0.1V0.9O5.35)/Jperovskite-oxide (La0.6Sr0.4Co0.78Ni0.02 Fe 0.2O3) was developed for a NASICON (Na3Zr 2Si2PO12; Na+ conductor)-based potentiometric CO2 sensor. The fabricated electrochemical cell expressed as, CO2, O2/Au (sensing electrode)JLi 2CO3-BaCO3 (auxiliary phase)JNASICON/ BiCuVOx/BiCuVOx-perovskite-oxide (reference electrode) /O2, responded well to changes in CO2 concentration (100-400 ppm) at 450°C under high humid conditions (88%RH). The potential of the developed reference electrode was stable and exhibited little interference by water vapor. Furthermore, the reference electrode potential did not response to CO2 even after the BiCuVOx layer was contaminated with carbonate, indicating a good stability of BiCuVOx against CO 2. The sensor device attached with the laminated solid-reference electrode showed a good warming-up characteristic, i.e., the electromotive force (EMF) of the device reached a steady and constant value when the sensor operation is re-started even after the sensor was exposed to humid air containing CO2 at room temperature.
AB - A laminated solid-reference electrode of BiCuVOx (Bi 2Cu0.1V0.9O5.35)/Jperovskite-oxide (La0.6Sr0.4Co0.78Ni0.02 Fe 0.2O3) was developed for a NASICON (Na3Zr 2Si2PO12; Na+ conductor)-based potentiometric CO2 sensor. The fabricated electrochemical cell expressed as, CO2, O2/Au (sensing electrode)JLi 2CO3-BaCO3 (auxiliary phase)JNASICON/ BiCuVOx/BiCuVOx-perovskite-oxide (reference electrode) /O2, responded well to changes in CO2 concentration (100-400 ppm) at 450°C under high humid conditions (88%RH). The potential of the developed reference electrode was stable and exhibited little interference by water vapor. Furthermore, the reference electrode potential did not response to CO2 even after the BiCuVOx layer was contaminated with carbonate, indicating a good stability of BiCuVOx against CO 2. The sensor device attached with the laminated solid-reference electrode showed a good warming-up characteristic, i.e., the electromotive force (EMF) of the device reached a steady and constant value when the sensor operation is re-started even after the sensor was exposed to humid air containing CO2 at room temperature.
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U2 - 10.2109/jcersj2.115.706
DO - 10.2109/jcersj2.115.706
M3 - Article
AN - SCOPUS:44849102394
VL - 115
SP - 706
EP - 711
JO - Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
JF - Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
SN - 1882-0743
IS - 1347
ER -