Abstract
The nonlinear frequency response behavior of a proton exchange membrane fuel cell (PEMFC) with different O2 stoichiometry is characterized and analyzed by total harmonic distortion (THD) spectroscopy. Damjanovic oxygen reduction reaction (ORR) mechanisms with either oxygen electrochemisorption or oxygen chemisorption are comparatively studied in the simulation through THD spectroscopy and commonly used methods that include steady state current–voltage (I–V) curve and electrochemical impedance spectroscopy (EIS). Comparison results show that only THD spectroscopy is able to make a fine distinction for the ORR mechanisms in certain kinetically controlled frequency ranges. The Damjanovic ORR mechanism with oxygen chemisorption is recognized as a better option for the ORR process in the PEMFC due to the reproducible experimental THD spectra. The observed nonlinear response in the frequency range from 2.5Hz to 15.8Hz is also recognized as the fingerprint of the ORR process.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
