Electrocatalytic performances of N-doped graphene with anchored iridium species in oxygen reduction reaction

Development of new systems with high catalytic performances in the oxygen reduction reaction (ORR) for practical applications in fuel cells and metal-air batteries is a challenge. We develop a one-pot solution method for producing a novel hybrid material consisting of Ir species anchored on N-doped...

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Bibliographic Details
Published in:2d materials 2015-09, Vol.2 (3), p.34019
Main Authors: Choi, Kwangrok, Lee, Seungjun, Shim, Yeonjun, Oh, Junghoon, Kim, Sujin, Park, Sungjin
Format: Article
Language:English
Subjects:
Atomic structure
Durability
electrocatalysts
Electrodes
Graphene
Iridium
Metal air batteries
Methyl alcohol
oxygen reduction reaction
reduced graphene oxide
Reduction
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Summary:Development of new systems with high catalytic performances in the oxygen reduction reaction (ORR) for practical applications in fuel cells and metal-air batteries is a challenge. We develop a one-pot solution method for producing a novel hybrid material consisting of Ir species anchored on N-doped graphene. The hybrid is synthesized by reacting graphene oxide with IrCl3 xH2O in dimethylformamide under reflux. Chemical and structural analyses confirm the attachment of Ir atoms to the N and O atoms of the N-doped graphene-based materials. The hybrid shows a good electrocatalytic performance for the ORR in alkaline media, with an onset potential of 0.88 V (versus the reversible hydrogen electrode), high long-term durability, and good tolerance for methanol poisoning.
ISSN:2053-1583
2053-1583
DOI:10.1088/2053-1583/2/3/034019