Journal
CARBON
Volume 119, Issue -, Pages 201-210Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2017.04.038
Keywords
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Funding
- Basic and Frontier Research Program of Chongqing Municipality [cstc2015jcyjA50032, cstc2014jcyjA50038]
- Yongchuan Science and Technology Commission (Ycstc) [2016nc6001]
- Chongqing Municipal Education Commission [KJ1711289, KJ1501118]
- Chongqing University of Arts and Sciences [R2014CJ02, P2016XC07]
- Innovation Team Project of Chongqing Municipal Education Commission [CXTDX201601037]
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Low-cost facile fabrication of highly efficient non-precious-metal catalysts to replace commercial Pt-based catalysts for oxygen reduction reaction (ORR) has attracted great attentions, because it is significant for rapid commercialization of fuel cells. Based on a fact that graphdiyne, another member of the carbon family, has not been systematically investigated as a new carbon support to ORR catalysts. We here report an effective strategy for easy synthesis of a cheap iron-nitrogen-doped carbon nanolayers wrapped around graphdiyne core-shell electrocatalyst (Fe-PANI@GD-900) for ORR from one-step pyrolysis of iron and polyaniline loaded onto graphdiyne nanocomposite at 900 degrees C. Electrochemical results indicate that the catalyst exhibits unexpectedly high ORR activity with onset and half-wave potentials of 1.05 V and 0.82 V (vs. RHE), while its mass activity at given potentials is lower than that of the Pt/C catalyst. Moreover, Fe-PANI@GD-900 follows a direct four-electron reduction pathway, and its long-term stability is superior to Pt/C and other graphdiyne-based catalysts previously reported in the literature. The relatively excellent ORR performance may be largely attributed to the formation of high contents of graphitic-N and Fe-N compounds, and the addition of graphdiyne facilitating to absolutely accelerate ORR charge transfer and fully expose more N-doped active sites on the surface. (C) 2017 Elsevier Ltd. All rights reserved.
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