Development and testing of an electrochemical methane sensor

Sekhar, Praveen K.; Kysar, Jesse; Brosha, Eric Lanich; Kreller, Cortney R.

doi:10.1016/j.snb.2015.12.100

Development and testing of an electrochemical methane sensor

Journal Article · Tue Jan 12 00:00:00 EST 2016 · Sensors and Actuators. B, Chemical

DOI:https://doi.org/10.1016/j.snb.2015.12.100· OSTI ID:1408835

Sekhar, Praveen K. ^[1]; Kysar, Jesse ^[1]; ^[2]; ^[2]

Washington State Univ., Pullman, WA (United States)
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

In this article, the development of an electrochemical methane sensor is presented. The mixed potential based sensor is based on tin doped indium oxide (ITO) and platinum electrodes and yttria-stabilized zirconia (YSZ) electrolyte. The sensor was fabricated using the inexpensive tape-cast method. The sensor responded to methane with a response time of 15 s. The staircase response to methane indicated a 44 mV sensor response to 100 ppm of methane. The sensor response indicated a log-linear relationship with the methane concentration. Upon 500 h of sensor testing, a 5% reduction in methane sensitivity was observed. The cross-sensitivity study on the sensor indicated minimal interference to NO, NO₂, and CO₂. To improve the sensitivity to methane, a signal conditioning method referred to as the pulsed discharge technique (PDT) was applied. Finally, a fourfold increase in methane sensitivity was observed when the sensor was subjected to PDT. Future studies include the miniaturization of the sensor with integrated heater design.

View Accepted Manuscript (DOE)

Research Organization:: Los Alamos National Lab. (LANL), Los Alamos, NM (United States)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Fuel Cell Technologies Office (EE-3F)

Grant/Contract Number:: AC52-06NA25396

OSTI ID:: 1408835

Report Number(s):: LA-UR--17-22339

Journal Information:: Sensors and Actuators. B, Chemical, Journal Name: Sensors and Actuators. B, Chemical Journal Issue: C Vol. 228; ISSN 0925-4005

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Energy Sciences
ITO
YSZ
electrochemical
gas sensor
methane
mixed potential

Development and testing of an electrochemical methane sensor

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