A Stable Sensing-Electrode Material in Reducing Atmosphere at High Temperature for Zirconia-Based Amperometric NOx Sensor

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La0.8Sr0.2Al1−xMnxO3 (x = 0, 0.2, 0.4, 0.6) were synthesized using a spray pyrolysis method as a stable sensing-electrode (SE) material in high-temperature reducing atmosphere for zirconia-based amperometric NOx sensor. The XRD diffraction pattern of the La0.8Sr0.2AlO3 oxide after treatment in a reducing atmosphere (in 4 vol.% H2 at 750°C for 2 h) was same with the one as-prepared. A response to 500 ppm NO2 of a sensor using the oxide after treatment as an SE was −1.3 µA, a value approximately equal to that obtained using an oxide before treatment.

Journal

  • Electrochemistry

    Electrochemistry 81 (2), 74-76, 2013

    The Electrochemical Society of Japan

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