Electrocatalytic activity of iridium oxide nanoparticles coated on carbon for oxygen reduction as cathode catalyst in polymer electrolyte fuel cell

The iridium oxide nanoparticles supported on Vulcan XC-72 porous carbon were prepared for cathode catalyst in polymer electrolyte fuel cell (PEFC). The catalyst has been characterized by transmission electron microscopy (TEM) and in PEFC tests. The iridium oxide nanoparticles, which were uniformly d...

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Bibliographic Details
Published in:Journal of power sources 2010-09, Vol.195 (18), p.5938-5941
Main Authors: Chang, C.H., Yuen, T.S., Nagao, Y., Yugami, H.
Format: Article
Language:English
Subjects:
Applied sciences
Carbon
Carbon-supported iridium oxide
Catalysis
Catalysts
Catalysts: preparations and properties
Cathodes
Chemistry
Direct energy conversion and energy accumulation
Electrical engineering. Electrical power engineering
Electrical power engineering
Electrochemical conversion: primary and secondary batteries, fuel cells
Energy
Energy. Thermal use of fuels
Equipments for energy generation and conversion: thermal, electrical, mechanical energy, etc
Exact sciences and technology
Fuel cells
General and physical chemistry
Iridium
Membrane electrode assembly
Nanoparticles
Oxides
Oxygen reduction reaction
Polymer electrolyte fuel cell
Reduction (electrolytic)
Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
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Summary:The iridium oxide nanoparticles supported on Vulcan XC-72 porous carbon were prepared for cathode catalyst in polymer electrolyte fuel cell (PEFC). The catalyst has been characterized by transmission electron microscopy (TEM) and in PEFC tests. The iridium oxide nanoparticles, which were uniformly dispersed on carbon surface, were 2–3 nm in diameter. With respect to the oxygen reduction reaction (ORR) activity was also studied by cyclic voltammetry (CV), revealing an onset potential of about 0.6 V vs. an Ag/AgCl electrode. The ORR catalytic activity of this catalyst was also tested in a hydrogen–oxygen single PEFC and a power density of 20 mW cm −2 has been achieved at the current density of 68.5 mA cm −2. This study concludes that carbon-supported iridium oxide nanoparticles have potential to be used as cathode catalyst in PEFC.
ISSN:0378-7753
1873-2755
DOI:10.1016/j.jpowsour.2010.01.049