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Magnetic N‐Enriched Fe 3 C/Graphitic Carbon instead of Pt as an Electrocatalyst for the Oxygen Reduction Reaction
Author(s) -
Wang Xiaobai,
Zhang Peng,
Wang Wei,
Lei Xiang,
Yang Hua
Publication year - 2016
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201505138
Subject(s) - electrocatalyst , oxygen reduction reaction , carbon fibers , oxygen , oxygen reduction , chemistry , reduction (mathematics) , materials science , inorganic chemistry , chemical engineering , electrochemistry , electrode , organic chemistry , engineering , composite material , composite number , geometry , mathematics
A series of Fe 3 C/C‐N x nanoparticles (NPs) with different nitrogen content are prepared by a simple one‐pot route. In the synthetic procedure, aniline and acetonitrile are simultaneously used as the carbon and nitrogen source. The effect of calcination temperature on the structural and functional properties of the materials is investigated. Magnetic measurement shows that the sample prepared at 800 °C (Fe 3 C/C‐N 800 NPs) possesses the highest M s value of 77.2 emu g −1 . On testing as oxygen reduction reaction (ORR) catalysts, the sample prepared at 750 °C (Fe 3 C/C‐N 750 NPs) shows the best ORR performance among the series, with a more positive onset potential (+0.99 V vs. RHE), higher selectivity (number of electron transfer n≈3.93), longer durability, and stronger tolerance against methanol crossover than commercial Pt/C catalysts in a 0.1 m KOH solution. Moreover, in acidic solution, the excellent ORR activity and stability are also exhibited.