Effects of noble metal addition on response of ceria thick film CO sensors

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

研究成果: Contribution to journalArticle査読

30 被引用数 (Scopus)

抄録

Cerium oxide (ceria) CO sensors exhibit fast, but smaller response than tin dioxide CO sensors; therefore, improvement in the response of ceria CO sensors is required. The effects of noble metal addition (Pt, Ag, Pd, or Au nanoparticles) on the response of ceria thick film CO sensors were investigated. The ceria thick film sensors with Au nanoparticles exhibited good response to CO; the addition of 5 wt% Au caused a 40 times increase in the sensor response. In contrast, no change in response was observed for the addition of Au to tin dioxide sensors. The response of the ceria sensors with Au decreased in the presence of propane or ethane compared to that without the noble metal. The sensors with Ag nanoparticles showed an increase response in the first measurement, but this response decreased with each measurement. Pd addition to the ceria sensors resulted in uneven responses and no increase in resistance was observed, in contrast to the tin dioxide sensors of which the resistance increases by Pd addition. In the case of the ceria sensors with Pt nanoparticles, the response was approximately the same as the sensors without noble metal nanoparticles.

本文言語英語
ページ(範囲)350-353
ページ数4
ジャーナルSensors and Actuators, B: Chemical
171-172
DOI
出版ステータス出版済み - 8 2012
外部発表はい

All Science Journal Classification (ASJC) codes

  • 電子材料、光学材料、および磁性材料
  • 器械工学
  • 凝縮系物理学
  • 表面、皮膜および薄膜
  • 金属および合金
  • 電子工学および電気工学
  • 材料化学

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