Performance and stability characteristics of MEAs with carbon-supported Pt and Pt1Ni1 nanoparticles as cathode catalysts in PEM fuel cell

Title
Performance and stability characteristics of MEAs with carbon-supported Pt and Pt1Ni1 nanoparticles as cathode catalysts in PEM fuel cell
Authors
조용훈전태열임주완조윤환안민제정남기유성종윤원섭성영은
Keywords
고분자연료전지; PtNi alloy catalysts; stability; Polymer electrolyte membrane fuel cell (PEMFC); Platinumenickel alloy; Charge transfer resistance; Electrochemical impedance; spectroscopy
Issue Date
2011-04
Publisher
International journal of hydrogen energy
Citation
VOL 36, NO 7, 4394-4399
Abstract
Polarization curves of membrane electrode assemblies (MEAs) containing carbon-supported platinum (Pt/C) and platinumenickel alloy (Pt1Ni1/C) as cathode catalysts were obtained for durability test as a function of time over 1100 h at constant current. Charge transfer resistance was measured using electrochemical impedance spectroscopy and postmortem analysis such as X-ray diffraction and high-resolution transmission electron microscopy was conducted in order to elucidate the degradation factors of each MEA. Our results demonstrate that the reduced performance of MEAs containing Pt1Ni1/C as a cathode catalyst was due to decreased oxygen reduction reaction caused by the corrosion of Ni, whereas that of MEAs containing Pt/C was because of reduced electrochemical surface area induced by increased Pt particle size.
URI
http://pubs.kist.re.kr/handle/201004/39438
ISSN
0360-3199
Appears in Collections:
KIST Publication > Article
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