Novel solid-state manganese oxide-based reference electrode for YSZ-based oxygen sensors

SENSORS AND ACTUATORS B-CHEMICAL

卷:152

Article

Miura, Norio¹  Jin, Han²  Wama, Ryotaro²  Nakakubo, Shouhei²  Elumalai, Perumal¹  Plashnitsa, Vladimir V.³ 

[1] Kyushu Univ, Art Sci & Technol Ctr Cooperat Res, Kasuga, Fukuoka 8168580, Japan

[2] Kyushu Univ, Interdisciplinary Grad Sch Engn Sci, Kasuga, Fukuoka 8168580, Japan

[3] Kyushu Univ, Res & Educ Ctr Carbon Resources, Kasuga, Fukuoka 8168580, Japan

关键词: Oxygen sensor;    Solid reference electrode;    YSZ;    Mn(2)O(3);   

DOI  :  10.1016/j.snb.2010.12.018

来源: Elsevier

【 摘 要 】

Various Mn-based oxides have been screened to find a suitable all-solid-state gas-insensitive reference-electrode (RE) for yttria-stabilized zirconia (YSZ)-based potentiometric oxygen sensor. The experimental observation of tubular YSZ-based sensors attached with each of the outer Mn-based oxide sensing electrodes (SEs) and the inner Pt-RE revealed that Mn(2)O(3)-SE was insensitive to all gases including oxygen at operating temperatures below 550 degrees C. Thus, the planar-like rod-type YSZ-based sensor using Pt-SE, Au-SE and Mn(2)O(3)-RE was then fabricated and its sensing performances were evaluated at 550 C. As a result, the planar sensor using a couple of Pt-SE and Mn(2)O(3)-RE exhibited excellent responses to oxygen in the concentration range of 0.05-21 vol.% obeying Nernst equation and gave negligible responses to other co-existing gases. Close similarity of the results for tubular and planar sensors operated in a wide range of air/fuel (A/F) ratio indicated that the tubular YSZ-based sensor using the inner Pt-RE could be successfully miniaturized to the planar one using Mn(2)O(3)-RE without sacrificing its performance. (C) 2010 Elsevier B.V. All rights reserved.

【 授权许可】

Free