(Invited) Field Trials Testing of Mixed Potential Electrochemical Hydrogen Safety Sensors at Commercial California Hydrogen Filling Stations. (25th October 2017)

• Record Type: Journal Article
• Authors: Brosha, Eric L.; Romero, Christopher J.; Poppe, Daniel; Williamson, Todd L.; Kreller, Cortney R.; Mukundan, Rangachary; Glass, Robert S.; Wu, Amanda S.
• Is Part Of: ECS transactions. Volume 80:Number 10(2017)
• Page Start: 1333
• Page End: 1344
• Publication Date: 2017-10-25
• Subjects: Electrochemistry -- Periodicals; Electrochemistry; Periodicals; Electronic journals; Electronic journal; 541.37
• DOI: 10.1149/08010.1333ecst
• Languages: English
• ISSNs: 1938-5862

Abstract

Abstract : Hydrogen safety sensors must meet specific performance requirements, mandated by the U.S. Department of Energy, for hydrogen fueling station monitoring. Here, we describe the long-term performance of two zirconia-based mixed potential electrochemical hydrogen gas sensors, developed specifically with a high sensitivity to hydrogen, low cross-sensitivity, chemical stability across operating temperatures, and fast response time. Over a two-year period, sensors with two different working electrodes—tin-doped indium oxide and strontium doped lanthanum chromite—were deployed at hydrogen filling stations in the Los Angeles area. The sensors exhibit high baseline stability and excellent correlation with logged filling/release events, making these materials good candidates for applications requiring long-life, drift-free baseline operation, in which sensor calibrations and replacements are prohibitive.