Premium
Pearl Necklace Fibrous Carbon Sharing Fe–N/Fe–P Dual Active Sites as Efficient Oxygen Reduction Catalyst in Broad Media and for Liquid/Solid‐State Rechargeable Zn–Air Battery
Author(s) -
Wu Mengchen,
Liu Rui
Publication year - 2020
Publication title -
energy technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.91
H-Index - 44
eISSN - 2194-4296
pISSN - 2194-4288
DOI - 10.1002/ente.201901263
Subject(s) - catalysis , battery (electricity) , materials science , carbonization , polyacrylonitrile , chemical engineering , carbon fibers , nanofiber , cathode , carbon nanofiber , nanotechnology , chemistry , organic chemistry , composite material , polymer , power (physics) , scanning electron microscope , physics , quantum mechanics , composite number , engineering
Optimized catalysts are attractive from the standpoint of energy storage and conversion. Herein, a pearl necklace fibrous carbon catalyst with Fe–N/Fe–P dual active sites (Fe–P/NHCF) is fabricated via carbonization–phosphidation of metal–organic framework (MOF)/polyacrylonitrile nanofibers. Benefiting from Fe–N/Fe–P doping‐induced active sites, accompanied by particular hierarchical porous merit and a 1D necklace network to facilitate the oxygen reduction reaction (ORR), it exhibits a half‐wave potential of 0.82 V in alkaline medium and outperforms commercial Pt/C in terms of stability in acid medium. Furthermore, a low voltage gap (1.04 V) is acquired in a liquid Zn–air battery with Fe–P/NHCF as the cathode. Meanwhile, the portable solid‐state Zn–air battery displays an open circuit voltage of 1.32 V and a power density of 42 mW cm −2 . This strategy puts forward a protocol to develop tailored geometry with dual active sites for ORR in alkaline/acid media, which is expected to promote devices of practical significance.