TY - JOUR
T1 - Highly selective amperometric sensors for carbon monoxide detection in exhaust gas
AU - Phawachalotorn, Chanadda
AU - Sanguanruang, Oravan
AU - Ishihara, Tatsumi
N1 - Funding Information:
The financial support from the Development and Promotion of Science and Technology Talents Project (DPST) , Thailand is gratefully acknowledged. The authors would also like to thank Mr. J. Iwata, Department of Applied Chemistry, Faculty of Engineering, Kyushu University for SEM observation.
PY - 2012/1/3
Y1 - 2012/1/3
N2 - An amperometric electrochemical sensor based on LaGaO 3 was demonstrated as highly sensitive to carbon monoxide (CO) in the temperatures ranging from 300 °C to 500 °C. In the present study, various Fe-doped LaGaO 3 electrolytes (La 0.8Sr 0.2Ga 0.8Mg 0.2-xFe xO 3; x = 0.05, 0.10, 0.15, 0.2 and La 0.8Sr 0.2Ga 1-xFe xO 3; x = 0.10, 0.15, 0.2, 0.3) coupled with Au10 wt%-In 1.9Sn 0.1O 3 (ITO955) and RuO 2-La 0.6Sr 0.4CoO 3 (LSC64) as the electrode catalysts were investigated. Highest sensitivity was achieved at 8.83 mA/decade (at 500 °C) by doping 15 mol% Fe into electrolyte (denoted as LSGF 828515) among the examined electrolytes. The sensitivities of all studied sensors were high and the current increased with increasing CO concentration. The sensors were fast, highly sensitive to CO and almost insensitive to other coexisting gases such as CH 4, CO 2, and H 2. Therefore, this sensor can be used for CO monitoring of exhaust gas from a small indoor combustion source.
AB - An amperometric electrochemical sensor based on LaGaO 3 was demonstrated as highly sensitive to carbon monoxide (CO) in the temperatures ranging from 300 °C to 500 °C. In the present study, various Fe-doped LaGaO 3 electrolytes (La 0.8Sr 0.2Ga 0.8Mg 0.2-xFe xO 3; x = 0.05, 0.10, 0.15, 0.2 and La 0.8Sr 0.2Ga 1-xFe xO 3; x = 0.10, 0.15, 0.2, 0.3) coupled with Au10 wt%-In 1.9Sn 0.1O 3 (ITO955) and RuO 2-La 0.6Sr 0.4CoO 3 (LSC64) as the electrode catalysts were investigated. Highest sensitivity was achieved at 8.83 mA/decade (at 500 °C) by doping 15 mol% Fe into electrolyte (denoted as LSGF 828515) among the examined electrolytes. The sensitivities of all studied sensors were high and the current increased with increasing CO concentration. The sensors were fast, highly sensitive to CO and almost insensitive to other coexisting gases such as CH 4, CO 2, and H 2. Therefore, this sensor can be used for CO monitoring of exhaust gas from a small indoor combustion source.
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U2 - 10.1016/j.snb.2011.10.081
DO - 10.1016/j.snb.2011.10.081
M3 - Article
AN - SCOPUS:84856212687
SN - 0925-4005
VL - 161
SP - 635
EP - 640
JO - Sensors and Actuators, B: Chemical
JF - Sensors and Actuators, B: Chemical
IS - 1
ER -