01968nam a2200265Ia 4500 MX-MdCICY 20260521091406.0 CICY B-13972 Application of complementary analytical tools to support interpretation of polymer-electrolyte-membrane fuel cell impedance data Journal of Power Sources, 196(8), p.3736-3742, 2011 A series of ex situ techniques, including scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, X-ray diffraction, and inductively coupled plasma-mass spectroscopy were used to study morphological and chemical changes associated with the aging of a membrane electrode assembly in a olymer-electrolyte-membrane fuel cell. These results were correlated with the results of in situ electrochemical measurements, including measurement of steady-state polarization curves and electrochemical impedance spectroscopy. The results support the premise that the low-frequency inductive features seen in the impedance response provide information useful for understanding phenomena, such as platinum oxidation, that lead to reduction of fuel cell performance. The reduction in electrochemically active surface area, obtained from the high-frequency part of the impedance response, was consistent with the observed agglomeration of platinum particles and platinum oxidation. X-RAY DIFFRACTION X-RAY PHOTOELECTRON SPECTROSCOPY TRANSMISSION ELECTRON MICROSCOPY SCANNING ELECTRON MICROSCOPY CAPACITANCE IMPEDANCE SPECTROSCOPY Roy, S.K. Hagelin-Weaver, H. Orazem. M.E. https://drive.google.com/file/d/1mrKL5wvH4ndNIz-UjLQKcLUz038-NIWx/view?usp=drivesdk Para ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx Loc REF1 250602s9999 xx |||||s2 |||| ||und|d 24106 24106 0 0 Loc 0 0 F1 CICY CICY RE 2025-06-25 0 B-13972 2025-06-25 15:39:32 2025-06-25 REF1