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090			_aB-13972
245	1	0	_aApplication of complementary analytical tools to support interpretation of polymer-electrolyte-membrane fuel cell impedance data
490	0		_vJournal of Power Sources, 196(8), p.3736-3742, 2011
520	3		_aA 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.
650	1	4	_aX-RAY DIFFRACTION
650	1	4	_aX-RAY PHOTOELECTRON SPECTROSCOPY
650	1	4	_aTRANSMISSION ELECTRON MICROSCOPY
650	1	4	_aSCANNING ELECTRON MICROSCOPY
650	1	4	_aCAPACITANCE
650	1	4	_aIMPEDANCE SPECTROSCOPY
700	1	2	_aRoy, S.K.
700	1	2	_aHagelin-Weaver, H.
700	1	2	_aOrazem. M.E.
856	4	0	_uhttps://drive.google.com/file/d/1mrKL5wvH4ndNIz-UjLQKcLUz038-NIWx/view?usp=drivesdk _zPara ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx
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