High temperature fiber-optic evanescent wave hydrogen sensors using La-doped SrTiO3 for SOFC applications

SENSORS AND ACTUATORS B-CHEMICAL

卷:221

Article

Schultz, Andrew M.¹  Brown, Thomas D.¹  Buric, Michael P.¹  Lee, Shiwoo²  Gerdes, Kirk¹  Ohodnicki, Paul R.¹ 

[1] Natl Energy Technol Lab, Pittsburgh, PA 15236 USA

[2] AECOM GES, Morgantown, WV 26507 USA

关键词: Optical fiber sensor;    Metal oxide;    Hydrogen sensor;    SrTiO3;    High temperature;   

DOI  :  10.1016/j.snb.2015.07.046

来源: Elsevier

【 摘 要 】

Advanced sensors are needed for development of next-generation fossil fuel power generation technologies and for enhancing efficiencies of existing power generation systems. Optical waveguide-based sensing technologies have become increasingly important for harsh environment energy applications. In this manuscript, we present sensing results for fiber-optic evanescent wave hydrogen sensors employing La-doped SrTiO3 layers as the active sensing element. These sensors show a rapid, reproducible sensing response to hydrogen fuel gas streams at elevated temperatures (600-800 degrees C). The presence of hydrogen results in a reversible and reproducible decrease in near-infrared transmission through the sensor. Sensors were also tested directly in the anode assembly of an operating solid oxide fuel cell (SOFC) with the sensor response correlating with both H-2 concentration and SOFC cell potential. (C) 2015 Elsevier B.V. All rights reserved.

【 授权许可】

Free