Performance and stability characteristics of MEAs with carbon-supported Pt and Pt1Ni1 nanoparticles as cathode catalysts in PEM fuel cell
- Performance and stability characteristics of MEAs with carbon-supported Pt and Pt1Ni1 nanoparticles as cathode catalysts in PEM fuel cell
- 조용훈; 전태열; 임주완; 조윤환; 안민제; 정남기; 유성종; 윤원섭; 성영은
- 고분자연료전지; PtNi alloy catalysts; stability; Polymer electrolyte membrane fuel cell (PEMFC); Platinumenickel alloy; Charge transfer resistance; Electrochemical impedance; spectroscopy
- Issue Date
- International journal of hydrogen energy
- VOL 36, NO 7, 4394-4399
- 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.
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