You are not logged in Total: 7journals, 20,671articles Online
Login / Register
Forgot Login?
Main menuMain menu
What's new
Journal list
Visiting ranking
Phrase ranking
About us
Journal Site
Advanced Search

Home  >  Journal list  >  Journal of the Ceramic Society of Japan  >  Vol.118  No.1375 (March) (2010)  >  pp.180-183

Journal of the Ceramic Society of Japan
<<Previous article Vol.118  No.1375 (March) (2010)   pp.180 - 183 Next article>>

Amperometric-type NOx sensor based on YSZ electrolyte and La-based perovskite-type oxide sensing electrode

Taro UEDA1), Takayuki NAGANO1), Hajime OKAWA1) and Seiji TAKAHASHI1)
1) Japan Fine Ceramics Center

  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%).

Gas sensor, NOx, Amperometric, YSZ, Perovskite, Spray pyrolysis

Received: November 24, 2009
Accepted: January 15, 2010 , Published online: March 01, 2010
Copyright (c) 2010 The Ceramic Society of Japan



Terms of Use | Privacy Policy