Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 40, Issue 13, Pages 4531-4539Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2015.02.018
Keywords
Iron carbide; Nitrogen doped; Porous carbon nanosheets; Oxygen reduction; Acidic media
Categories
Funding
- NSFC [21373116, 21421001]
- Tianjin Natural Science Research Fund [13JCYBJC18300]
- RFDP [20120031110005]
- MOE Innovation Team of China [IRT13022]
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By simple thermal treatment of low-cost precursors (melamine, FeSO4 and 1, 10-phenanthroline) in inert atmosphere, nitrogen-doped porous carbon nanosheets with embedded iron carbide nanoparticles were prepared (denoted as Fe3C@N-C-T). The catalyst prepared at 900 degrees C (Fe3C@N-C-900) is composed of mesoporous nitrogen-doping carbon nanosheets and graphitized carbon covered iron carbide nanoparticles (10-20 nm), with relatively high specific area (705 m(2) g(-1)). As non-precious metal catalyst, Fe3C@N-C-900 exhibits highly efficient electrocatalytic activity (half-wave potential of 0.806 V and kinetic limiting current density (i(k)) of 18.35 mA cm(-2) at 0.7 V) for oxygen reduction reaction (ORR) in acidic media, through an efficient four-electron ORR process. In addition, Fe3C@N-C-900 also displays better methanol tolerance and higher stability (only 12.5% loss after 20,000 s) in comparison to commercial Pt/C catalyst. Copyright (C) 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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