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高性能限流器氧传感器，由高活性 LaSrCrMnO₃ 电极组成。

High-Performance Limiting Current Oxygen Sensor Comprised of Highly Active LaSrCrMnO₃ Electrode.

机构信息

Environmental Monitor & Sensing Technology Laboratory, School of Electrical Engineering and Computer Science, Ningbo University, Ningbo 315211, China.

State Key Laboratory of Transducer Technology, Chinese Academy of Sciences, Shanghai 200050, China.

出版信息

Sensors (Basel). 2018 Jul 4;18(7):2155. doi: 10.3390/s18072155.

DOI:10.3390/s18072155
PMID:29973553
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6069003/
Abstract

Zirconia-based limiting current oxygen sensor gains considerable attention, due to its high-performance in improving the combustion efficiency of fossil fuels and reducing the emission of exhaust gases. Nevertheless, the Pt electrode is frequently used in the oxygen sensor, therefore, it restrains the broader application due to the high cost. Quite recently, LaSrCrMnO₃ (LSCM) has been reported to be highly active to catalyze oxygen reduction. Herein, with the intention of replacing the frequently used Pt, we studied the practicability of adapting the LSCM to zirconia-based limiting current oxygen sensor. Through comparing the electrocatalytic activity of LSCM and Pt, it is confirmed that LSCM gave analogous oxygen reactivity with that of the Pt. Then, limiting the current oxygen sensors comprised of LSCM or Pt are fabricated and their sensing behavior to oxygen in the range of 2⁻25% is evaluated. Conclusively, quick response/recovery rate (within 7s), linear relationship, and high selectivity (against 5% CO₂ and H₂O) in sensing oxygen are observed for the sensors, regardless of the sensing materials (LSCM or Pt) that are used in the sensor. Particularly, identical sensing characteristics are observed for the sensors consisting of LSCM or Pt, indicating the practicability of replacing the Pt electrode by adapting the LSCM electrode to future zirconia-based oxygen sensors.

摘要

基于氧化锆的限流式氧传感器因其能够提高化石燃料的燃烧效率和减少废气排放而备受关注。然而，氧传感器中经常使用 Pt 电极，因此由于成本高，限制了其更广泛的应用。最近，LaSrCrMnO₃（LSCM）被报道具有很高的催化氧还原活性。在此，我们旨在用 LSCM 代替常用的 Pt，研究了将 LSCM 应用于基于氧化锆的限流式氧传感器的可行性。通过比较 LSCM 和 Pt 的电催化活性，证实 LSCM 具有与 Pt 类似的氧反应性。然后，制备了由 LSCM 或 Pt 组成的限流式氧传感器，并评估了它们在 2%至 25%范围内对氧气的传感性能。结论是，无论传感器中使用的是 LSCM 还是 Pt，传感器都表现出快速的响应/恢复速率（在 7s 内）、线性关系和对氧气的高选择性（对 5%CO₂和 H₂O 有抵抗力）。特别是，由 LSCM 或 Pt 组成的传感器表现出相同的传感特性，表明通过将 LSCM 电极适应未来基于氧化锆的氧传感器，可以用 LSCM 电极代替 Pt 电极。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7924/6069003/91d93a21cbdb/sensors-18-02155-g006a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7924/6069003/cd302c01c6b4/sensors-18-02155-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7924/6069003/252371a5609c/sensors-18-02155-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7924/6069003/f0da500541d0/sensors-18-02155-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7924/6069003/e8abcf2f13f1/sensors-18-02155-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7924/6069003/9fd86a053e53/sensors-18-02155-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7924/6069003/91d93a21cbdb/sensors-18-02155-g006a.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7924/6069003/cd302c01c6b4/sensors-18-02155-g001.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7924/6069003/252371a5609c/sensors-18-02155-g002.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7924/6069003/f0da500541d0/sensors-18-02155-g003.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7924/6069003/e8abcf2f13f1/sensors-18-02155-g004.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7924/6069003/9fd86a053e53/sensors-18-02155-g005.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/7924/6069003/91d93a21cbdb/sensors-18-02155-g006a.jpg

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本文引用的文献

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