Combustion-type H2 gas sensor using a PTC thermistor based on Bi, Na-Codoped BaTiO3 as a transducer

Naoki Tachibana; Masayoshi Yuasa; Tetsuya Kida; Noboru Yamazoe; Kengo Shimanoe

doi:10.1166/sl.2011.1411

Combustion-type H₂ gas sensor using a PTC thermistor based on Bi, Na-Codoped BaTiO₃ as a transducer

Naoki Tachibana, Masayoshi Yuasa, Tetsuya Kida, Noboru Yamazoe, Kengo Shimanoe

Functional Materials Science

Research output: Contribution to journal › Article › peer-review

3 Citations (Scopus)

Abstract

We investigated the H₂ sensing properties of a catalytic combustion-type hydrogen sensor using a BaTiO₃-based positive temperature coefficient (PTC) thermistor as a transducer. In this sensor, catalytic combustion of H₂ on Pt electrodes or a catalyst layer induces a remarkable change in the electric resistance as a sensor signal when the operating temperature is set near the Curie temperature of BaTiO₃ (120 °C). However, the sensor response to H₂ is relatively low at lower H₂ concentrations because of lower combustion efficiency near 120 °C. In this study, Ba_0.9(Bi_0.5Na _0.5)_0.1Ti_0.999Nb_0.001O3 (BNN-BT) with a higher Curie temperature (146 °C) was used as a transducer to increase the operating temperature and thus improve the sensor response. The sensor using BNN-BT and a Pt/SiO₂ combustion catalyst showed improved sensor responses particularly at lower H₂ concentrations. It also showed good response and recovery behaviors in response to 100-1000 ppm H ₂ in air.

Original language	English
Pages (from-to)	21-25
Number of pages	5
Journal	Sensor Letters
Volume	9
Issue number	1
DOIs	https://doi.org/10.1166/sl.2011.1411
Publication status	Published - 2011

All Science Journal Classification (ASJC) codes

Atomic and Molecular Physics, and Optics
Electrical and Electronic Engineering

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title = "Combustion-type H2 gas sensor using a PTC thermistor based on Bi, Na-Codoped BaTiO3 as a transducer",

abstract = "We investigated the H2 sensing properties of a catalytic combustion-type hydrogen sensor using a BaTiO3-based positive temperature coefficient (PTC) thermistor as a transducer. In this sensor, catalytic combustion of H2 on Pt electrodes or a catalyst layer induces a remarkable change in the electric resistance as a sensor signal when the operating temperature is set near the Curie temperature of BaTiO3 (120 °C). However, the sensor response to H2 is relatively low at lower H2 concentrations because of lower combustion efficiency near 120 °C. In this study, Ba0.9(Bi0.5Na 0.5)0.1Ti0.999Nb0.001O3 (BNN-BT) with a higher Curie temperature (146 °C) was used as a transducer to increase the operating temperature and thus improve the sensor response. The sensor using BNN-BT and a Pt/SiO2 combustion catalyst showed improved sensor responses particularly at lower H2 concentrations. It also showed good response and recovery behaviors in response to 100-1000 ppm H 2 in air.",

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AU - Tachibana, Naoki

AU - Yuasa, Masayoshi

AU - Kida, Tetsuya

AU - Yamazoe, Noboru

AU - Shimanoe, Kengo

PY - 2011

Y1 - 2011

N2 - We investigated the H2 sensing properties of a catalytic combustion-type hydrogen sensor using a BaTiO3-based positive temperature coefficient (PTC) thermistor as a transducer. In this sensor, catalytic combustion of H2 on Pt electrodes or a catalyst layer induces a remarkable change in the electric resistance as a sensor signal when the operating temperature is set near the Curie temperature of BaTiO3 (120 °C). However, the sensor response to H2 is relatively low at lower H2 concentrations because of lower combustion efficiency near 120 °C. In this study, Ba0.9(Bi0.5Na 0.5)0.1Ti0.999Nb0.001O3 (BNN-BT) with a higher Curie temperature (146 °C) was used as a transducer to increase the operating temperature and thus improve the sensor response. The sensor using BNN-BT and a Pt/SiO2 combustion catalyst showed improved sensor responses particularly at lower H2 concentrations. It also showed good response and recovery behaviors in response to 100-1000 ppm H 2 in air.

AB - We investigated the H2 sensing properties of a catalytic combustion-type hydrogen sensor using a BaTiO3-based positive temperature coefficient (PTC) thermistor as a transducer. In this sensor, catalytic combustion of H2 on Pt electrodes or a catalyst layer induces a remarkable change in the electric resistance as a sensor signal when the operating temperature is set near the Curie temperature of BaTiO3 (120 °C). However, the sensor response to H2 is relatively low at lower H2 concentrations because of lower combustion efficiency near 120 °C. In this study, Ba0.9(Bi0.5Na 0.5)0.1Ti0.999Nb0.001O3 (BNN-BT) with a higher Curie temperature (146 °C) was used as a transducer to increase the operating temperature and thus improve the sensor response. The sensor using BNN-BT and a Pt/SiO2 combustion catalyst showed improved sensor responses particularly at lower H2 concentrations. It also showed good response and recovery behaviors in response to 100-1000 ppm H 2 in air.

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Combustion-type H₂ gas sensor using a PTC thermistor based on Bi, Na-Codoped BaTiO₃ as a transducer

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