TY - JOUR
T1 - Long-term stability of Pt/alumina catalyst combustors for micro-gas sensor application
AU - Nishibori, M.
AU - Shin, W.
AU - Tajima, K.
AU - Houlet, L. F.
AU - Izu, N.
AU - Itoh, T.
AU - Matsubara, I.
N1 - Funding Information:
This work was supported by the New Energy and Industrial Technology Development Organization (NEDO), Japan.
PY - 2008
Y1 - 2008
N2 - Long-term stability of thick-film type Pt/alumina catalyst combustors integrated on the micro-thermoelectric hydrogen sensor (micro-THS) has been investigated. We prepared the catalyst thick films with three different thicknesses to investigate their combustion performance on the micro-device. To enhance the long-term stability, a self-heating treatment of the catalyst aging of the sensor with its micro-heater has been carried out. The performance of the sensor with the 15-μm thick catalyst which was the thickest one in this study was less temperature dependent, and more stable for long-term operation. While the sensor without aging treatment failed to detect 100 ppm H2 in air in a month, the sensor after aging treatment have detected 100 ppm H2 in air over 3 months. The degradation of its signal level for 1 vol.% and 100 ppm was below 10% and 15%, respectively. Nano-level microstructure observation of the catalyst investigating the Pt nano-particle dispersion has been carried out to discuss with mechanism of the performance degradation and the role of aging treatment on the stability of the sensing performance of the sensor.
AB - Long-term stability of thick-film type Pt/alumina catalyst combustors integrated on the micro-thermoelectric hydrogen sensor (micro-THS) has been investigated. We prepared the catalyst thick films with three different thicknesses to investigate their combustion performance on the micro-device. To enhance the long-term stability, a self-heating treatment of the catalyst aging of the sensor with its micro-heater has been carried out. The performance of the sensor with the 15-μm thick catalyst which was the thickest one in this study was less temperature dependent, and more stable for long-term operation. While the sensor without aging treatment failed to detect 100 ppm H2 in air in a month, the sensor after aging treatment have detected 100 ppm H2 in air over 3 months. The degradation of its signal level for 1 vol.% and 100 ppm was below 10% and 15%, respectively. Nano-level microstructure observation of the catalyst investigating the Pt nano-particle dispersion has been carried out to discuss with mechanism of the performance degradation and the role of aging treatment on the stability of the sensing performance of the sensor.
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U2 - 10.1016/j.jeurceramsoc.2008.02.018
DO - 10.1016/j.jeurceramsoc.2008.02.018
M3 - Article
AN - SCOPUS:43949137574
SN - 0955-2219
VL - 28
SP - 2183
EP - 2190
JO - Journal of the European Ceramic Society
JF - Journal of the European Ceramic Society
IS - 11
ER -