Journal
JOURNAL OF COLLOID AND INTERFACE SCIENCE
Volume 567, Issue -, Pages 165-170Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2020.02.005
Keywords
Dual-nitrogen-source; Graphitic carbon nitride; Metal carbide; Oxygen reduction reaction
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Funding
- Natural Science Foundation of Xinjiang Uygur Autonomous Region [2017D01C033]
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Rational design of low-cost and high-efficient non-precious-metal catalysts for oxygen reduction reaction (ORR) has drawn tremendous attention. Herein, we report a facile template-sacrificing strategy to synthesize N-doped hierarchically porous graphitic layers wrapped iron carbide (Fe3C@NPGL). Cost-effective graphitic carbon nitride (g-C3N4) combined with dopamine were used as dual-nitrogen-source which provide more active sites for ORR. By virtue of abundant Fe-N coordination sites and unique porous structure of NPGL, the as-fabricated Fe3C@NPGL exhibits excellent ORR performances with a half-wave potential of 0.87 V, a limited current density of 6.3 mA cm(-2), and a low peroxide yield (<2.5%), which outperform commercial Pt/C and most of the reported non-precious-metal catalysts. This work provides a feasible strategy to design novel ORR electrocatalysts. (C) 2020 Elsevier Inc. All rights reserved.
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