Gas response, response time and selectivity of a resistive CO sensor based on two connected CeO2 thick films with various particle sizes

Noriya Izu; Sayaka Nishizaki; Toshio Itoh; Maiko Nishibori; Woosuck Shin; Ichiro Matsubara

doi:10.1016/j.snb.2008.12.018

Gas response, response time and selectivity of a resistive CO sensor based on two connected CeO₂ thick films with various particle sizes

Noriya Izu, Sayaka Nishizaki, Toshio Itoh, Maiko Nishibori, Woosuck Shin, Ichiro Matsubara

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

51 Citations (Scopus)

Abstract

CO sensor elements were fabricated by connecting two cerium oxide (ceria) thick films with and without Pt/alumina catalyst. The resistance of the thick films and the output voltage of the connected sensor elementwere investigated by changing the particle size of the cerium oxide thick films. The cerium oxide thick film sintered at 950 °C, which had a particle size of 50 nm, displayed better response for CO gas and lower resistance than those films sintered at 800 or 1000 °C. The resistance of the cerium oxide thick film sintered at 950 °C changed more quickly than those sintered at 800 or 1030 °C, when air including COwas introduced. The 90% response time of the cerium oxide thick film sintered at 950 °Cwas approximately 2 s. The connected sensor element with Pt/alumina catalyst fabricated in this study exhibited low response for combustible gases such as methane, ethane, propane, ethylene, and H₂ at 450 °C, indicating that the connected sensor element has CO selectivity.

Original language	English
Pages (from-to)	364-370
Number of pages	7
Journal	Sensors and Actuators, B: Chemical
Volume	136
Issue number	2
DOIs	https://doi.org/10.1016/j.snb.2008.12.018
Publication status	Published - 2009
Externally published	Yes

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Instrumentation
Condensed Matter Physics
Surfaces, Coatings and Films
Metals and Alloys
Electrical and Electronic Engineering
Materials Chemistry

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10.1016/j.snb.2008.12.018

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title = "Gas response, response time and selectivity of a resistive CO sensor based on two connected CeO2 thick films with various particle sizes",

abstract = "CO sensor elements were fabricated by connecting two cerium oxide (ceria) thick films with and without Pt/alumina catalyst. The resistance of the thick films and the output voltage of the connected sensor elementwere investigated by changing the particle size of the cerium oxide thick films. The cerium oxide thick film sintered at 950 °C, which had a particle size of 50 nm, displayed better response for CO gas and lower resistance than those films sintered at 800 or 1000 °C. The resistance of the cerium oxide thick film sintered at 950 °C changed more quickly than those sintered at 800 or 1030 °C, when air including COwas introduced. The 90% response time of the cerium oxide thick film sintered at 950 °Cwas approximately 2 s. The connected sensor element with Pt/alumina catalyst fabricated in this study exhibited low response for combustible gases such as methane, ethane, propane, ethylene, and H2 at 450 °C, indicating that the connected sensor element has CO selectivity.",

author = "Noriya Izu and Sayaka Nishizaki and Toshio Itoh and Maiko Nishibori and Woosuck Shin and Ichiro Matsubara",

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T1 - Gas response, response time and selectivity of a resistive CO sensor based on two connected CeO2 thick films with various particle sizes

AU - Izu, Noriya

AU - Nishizaki, Sayaka

AU - Itoh, Toshio

AU - Nishibori, Maiko

AU - Shin, Woosuck

AU - Matsubara, Ichiro

PY - 2009

Y1 - 2009

N2 - CO sensor elements were fabricated by connecting two cerium oxide (ceria) thick films with and without Pt/alumina catalyst. The resistance of the thick films and the output voltage of the connected sensor elementwere investigated by changing the particle size of the cerium oxide thick films. The cerium oxide thick film sintered at 950 °C, which had a particle size of 50 nm, displayed better response for CO gas and lower resistance than those films sintered at 800 or 1000 °C. The resistance of the cerium oxide thick film sintered at 950 °C changed more quickly than those sintered at 800 or 1030 °C, when air including COwas introduced. The 90% response time of the cerium oxide thick film sintered at 950 °Cwas approximately 2 s. The connected sensor element with Pt/alumina catalyst fabricated in this study exhibited low response for combustible gases such as methane, ethane, propane, ethylene, and H2 at 450 °C, indicating that the connected sensor element has CO selectivity.

AB - CO sensor elements were fabricated by connecting two cerium oxide (ceria) thick films with and without Pt/alumina catalyst. The resistance of the thick films and the output voltage of the connected sensor elementwere investigated by changing the particle size of the cerium oxide thick films. The cerium oxide thick film sintered at 950 °C, which had a particle size of 50 nm, displayed better response for CO gas and lower resistance than those films sintered at 800 or 1000 °C. The resistance of the cerium oxide thick film sintered at 950 °C changed more quickly than those sintered at 800 or 1030 °C, when air including COwas introduced. The 90% response time of the cerium oxide thick film sintered at 950 °Cwas approximately 2 s. The connected sensor element with Pt/alumina catalyst fabricated in this study exhibited low response for combustible gases such as methane, ethane, propane, ethylene, and H2 at 450 °C, indicating that the connected sensor element has CO selectivity.

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Gas response, response time and selectivity of a resistive CO sensor based on two connected CeO₂ thick films with various particle sizes

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