期刊
CARBON
卷 151, 期 -, 页码 10-17出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.carbon.2019.05.063
关键词
Co4N nanocrystal; N-doped carbon; Oxygen reduction reaction; Oxygen evolution reaction; Zn-air battery
资金
- National Natural Science Foundation of China [21675147, 21802003]
- China Postdoctoral Science Foundation [2018M631239]
- Jilin Provincial Science and Technology Development Program [20190201242JC, 20180520142JH]
- Special Innovational Project of Department of Education of Guangdong Province [2015KTSCX142]
- Jiangmen Agriculture of Scientific and Technological Research Program [[2015]274]
The development of transition metal nitrides/carbon hybrids with well-organized morphology, outstanding efficiency and durability for Zn-air batteries are of great urgency. Herein, a morphology-controlled strategy to efficiently fabricate uniform Co4N nanoparticles anchored on N-doped carbon (Co4N@NC-m) is reported. The diameters and distribution of CNN nanocrystals can be tuned to be homogeneous profited by abundant N sources in melamine. Moreover, thanks to the advantages of higher nitrogen doping content, better electrical conductivity, higher degree of graphitization, and larger electrochemical surface area, Co4N@NC-m possesses excellent oxygen reduction reaction (half-wave potential of 0.87 V) and oxygen evolution reaction (overpotential of 398 mV at 10 mA cm(-2)) activities in basic solution. The Zn-air battery fabricated with Co4N@NC-m owns higher open circuit voltage (1.490 V), larger power density, and better rechargeability than those of the commercial IrO2 + 20% Pt/C catalysts, which proves the potential application in practical energy conversion devices. (C) 2019 Elsevier Ltd. All rights reserved.
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