Solid oxide amperometric CO sensor for monitoring exhaust gas from water heater

Tatsumi Ishihara; Phawachalotorn Armonat; Rie Kadowaki; Oravan Sanguanruang

Solid oxide amperometric CO sensor for monitoring exhaust gas from water heater

Tatsumi Ishihara, Phawachalotorn Armonat, Rie Kadowaki, Oravan Sanguanruang

Materials Science and Engineering, School of Engineering

Research output: Contribution to journal › Article

2 Citations (Scopus)

Abstract

An amperometric CO sensor using a solid oxide electrolyte was studied and it was found that the oxygen pumping current increased with increasing CO concentration when using Au(10 wt%)/In_1.9Sn_0.1Sn _0.1O₃ and RuO₂(10 wt%)/La_0.6Sr _0.4CoO₃ as the electrode catalysts and La _0.9Sr_0.1Ga_0.8Mg_0.2O₃ as the electrolyte. Mixed potentials are also observed on this sensor upon exposure to CO, and so changes in oxygen pumping current may be caused by the mixed potentials formed upon exposure to CO. Substitution of Ga in the LaGaO ₃ electrolyte with Fe is effective for increasing the sensitivity, and this sensor is almost insensitive to CO₂ and CH₄. As a result, it is expected that this sensor can be used for the detection of CO in exhaust gas from a small gas water heater without a flue line.

Original language	English
Pages (from-to)	183-192
Number of pages	10
Journal	Sensors and Materials
Volume	22
Issue number	4
Publication status	Published - 2010

All Science Journal Classification (ASJC) codes

Instrumentation
Materials Science(all)

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Ishihara, T., Armonat, P., Kadowaki, R., & Sanguanruang, O. (2010). Solid oxide amperometric CO sensor for monitoring exhaust gas from water heater. Sensors and Materials, 22(4), 183-192.

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abstract = "An amperometric CO sensor using a solid oxide electrolyte was studied and it was found that the oxygen pumping current increased with increasing CO concentration when using Au(10 wt%)/In1.9Sn0.1Sn 0.1O3 and RuO2(10 wt%)/La0.6Sr 0.4CoO3 as the electrode catalysts and La 0.9Sr0.1Ga0.8Mg0.2O3 as the electrolyte. Mixed potentials are also observed on this sensor upon exposure to CO, and so changes in oxygen pumping current may be caused by the mixed potentials formed upon exposure to CO. Substitution of Ga in the LaGaO 3 electrolyte with Fe is effective for increasing the sensitivity, and this sensor is almost insensitive to CO2 and CH4. As a result, it is expected that this sensor can be used for the detection of CO in exhaust gas from a small gas water heater without a flue line.",

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T1 - Solid oxide amperometric CO sensor for monitoring exhaust gas from water heater

AU - Ishihara, Tatsumi

AU - Armonat, Phawachalotorn

AU - Kadowaki, Rie

AU - Sanguanruang, Oravan

PY - 2010

Y1 - 2010

N2 - An amperometric CO sensor using a solid oxide electrolyte was studied and it was found that the oxygen pumping current increased with increasing CO concentration when using Au(10 wt%)/In1.9Sn0.1Sn 0.1O3 and RuO2(10 wt%)/La0.6Sr 0.4CoO3 as the electrode catalysts and La 0.9Sr0.1Ga0.8Mg0.2O3 as the electrolyte. Mixed potentials are also observed on this sensor upon exposure to CO, and so changes in oxygen pumping current may be caused by the mixed potentials formed upon exposure to CO. Substitution of Ga in the LaGaO 3 electrolyte with Fe is effective for increasing the sensitivity, and this sensor is almost insensitive to CO2 and CH4. As a result, it is expected that this sensor can be used for the detection of CO in exhaust gas from a small gas water heater without a flue line.

AB - An amperometric CO sensor using a solid oxide electrolyte was studied and it was found that the oxygen pumping current increased with increasing CO concentration when using Au(10 wt%)/In1.9Sn0.1Sn 0.1O3 and RuO2(10 wt%)/La0.6Sr 0.4CoO3 as the electrode catalysts and La 0.9Sr0.1Ga0.8Mg0.2O3 as the electrolyte. Mixed potentials are also observed on this sensor upon exposure to CO, and so changes in oxygen pumping current may be caused by the mixed potentials formed upon exposure to CO. Substitution of Ga in the LaGaO 3 electrolyte with Fe is effective for increasing the sensitivity, and this sensor is almost insensitive to CO2 and CH4. As a result, it is expected that this sensor can be used for the detection of CO in exhaust gas from a small gas water heater without a flue line.

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