Amperometric-type NOx sensor based on YSZ electrolyte and La-based perovskite-type oxide sensing electrode
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- UEDA Taro
- Japan Fine Ceramics Center
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- NAGANO Takayuki
- Japan Fine Ceramics Center
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- OKAWA Hajime
- Japan Fine Ceramics Center
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- TAKAHASHI Seiji
- Japan Fine Ceramics Center
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At present, lean-burn type engines or diesel engines for passenger cars have been developed and installed into automobiles to improve fuel efficiency. In these cases, NOx storage catalysts or selective catalytic reduction (SCR) systems are also installed for reducing NOx emission. In order to control these systems more efficiently, NOx sensor which responds selectively, quickly, and quantitatively are necessary. Here we focused on the NO direct decomposition function of La-based perovskite oxides. We applied them to a sensing electrode for the amperometric NOx sensor using yttria-stabilized zirconia (YSZ). La0.8Sr0.2MO3 (M = Co, Mn, Fe, Ni) powders were synthesized by means of spray pyrolysis method. Among four kinds of oxides studied, the sensor using La0.8Sr0.2MnO3-SE showed the highest sensitivity to NO2 as well as low base current even in the presence of excess O2 (21 vol%). The sensor also exhibited excellent NO2 selectivity at 500°C. The sensitivity was increased with an increase of NO2 concentration in an examined range between 50 to 800 ppm, and did not change in the examined O2 concentration range (5-21 vol%).
収録刊行物
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- Journal of the Ceramic Society of Japan
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Journal of the Ceramic Society of Japan 118 (1375), 180-183, 2010
公益社団法人 日本セラミックス協会
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詳細情報 詳細情報について
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- CRID
- 1390282680263128064
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- NII論文ID
- 130000304708
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- NII書誌ID
- AA12229489
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- ISSN
- 13486535
- 18820743
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- NDL書誌ID
- 10575445
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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