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Issue 4, 2019
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Atomic Fe hetero-layered coordination between g-C3N4 and graphene nanomeshes enhances the ORR electrocatalytic performance of zinc–air batteries

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Abstract

Hetero-layered iron–nitrogen coordination between g-C3N4 and graphene nanomeshes was developed for superior electrocatalytic activity in the oxygen reduction reaction. Compared with the performance of g-C3N4 or atomic Fe embedded in g-C3N4 in the oxygen reduction reaction, the current density at −0.5 V of the two-dimensional hetero-hybrid of atomic Fe, g-C3N4 and graphene was enhanced 13 times, and the half-wave potential of the hybrid positively shifted to 0.278 V. The hybrid exhibited superior electrocatalytic activity with a 20 mV more positive half-wave potential, higher current density, better methanol tolerance and longer-term stability compared to commercial Pt–C. This enhancement originated from mesh-on-mesh exposed inter-layer bridged Fe–N4.1 coordination active sites between g-C3N4 and graphene, which favored a four-electron pathway accompanied by the improvement of the conductivity and mass transport. Superior performance, including a low charge–discharge voltage gap over 20 h of cyling, of the hybrid-based Zn–air battery was achieved. This strategy of the hetero-layered interfacial metal–nitrogen coordination between different 2D materials is a general approach to develop advanced electrocatalysts for sustainable energy applications.

Graphical abstract: Atomic Fe hetero-layered coordination between g-C3N4 and graphene nanomeshes enhances the ORR electrocatalytic performance of zinc–air batteries

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Publication details

The article was received on 09 Oct 2018, accepted on 23 Dec 2018 and first published on 25 Dec 2018


Article type: Communication
DOI: 10.1039/C8TA09722D
Citation: J. Mater. Chem. A, 2019,7, 1451-1458
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    Atomic Fe hetero-layered coordination between g-C3N4 and graphene nanomeshes enhances the ORR electrocatalytic performance of zinc–air batteries

    C. Wang, H. Zhao, J. Wang, Z. Zhao, M. Cheng, X. Duan, Q. Zhang, J. Wang and J. Wang, J. Mater. Chem. A, 2019, 7, 1451
    DOI: 10.1039/C8TA09722D

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