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Issue 5, 2016
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N-Doped graphene frameworks with superhigh surface area: excellent electrocatalytic performance for oxygen reduction

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Abstract

N-Doped carbon materials are promising candidates as alternative catalysts to noble metals in promoting the oxygen reduction reaction (ORR) in fuel cells. However, methods to further reduce the ORR overpotential and improve related kinetics remain to be developed. This study reports that N-doped graphene frameworks (NGFs) synthesized from the rapid pyrolysis of solid glycine particles in the presence of sodium carbonate, display an extremely large specific surface area (1760 m2 g−1) and a graphitic-N-dominant C–N configuration. The NGFs can efficiently catalyze the electrochemical reduction of molecular oxygen into water following a 4e pathway, with a low overpotential (0.98 V of onset potential vs. RHE), very high kinetic limiting current density (16.06 mA cm−2), and turnover frequency (121 s−1), much better than the commercial Pt/C catalyst.

Graphical abstract: N-Doped graphene frameworks with superhigh surface area: excellent electrocatalytic performance for oxygen reduction

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Publication details

The article was received on 14 Sep 2015, accepted on 27 Dec 2015 and first published on 28 Dec 2015


Article type: Paper
DOI: 10.1039/C5NR06319A
Citation: Nanoscale, 2016,8, 2795-2803
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    N-Doped graphene frameworks with superhigh surface area: excellent electrocatalytic performance for oxygen reduction

    H. J. Cui, H. M. Yu, J. F. Zheng, Z. J. Wang, Y. Y. Zhu, S. P. Jia, J. Jia and Z. P. Zhu, Nanoscale, 2016, 8, 2795
    DOI: 10.1039/C5NR06319A

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