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A Three‐Dimensionally Structured Electrocatalyst: Cobalt‐Embedded Nitrogen‐Doped Carbon Nanotubes/Nitrogen‐Doped Reduced Graphene Oxide Hybrid for Efficient Oxygen Reduction
Author(s) -
Wei Changting,
Wang Hongjing,
Eid Kamel,
Kim Jeonghun,
Kim Jung Ho,
Alothman Zeid Abdullah,
Yamauchi Yusuke,
Wang Liang
Publication year - 2017
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201604113
Subject(s) - graphene , electrocatalyst , materials science , catalysis , carbon nanotube , cobalt , oxide , cobalt oxide , pyrolysis , methanol , carbon fibers , chemical engineering , nitrogen , inorganic chemistry , nanotechnology , electrochemistry , chemistry , composite number , composite material , organic chemistry , electrode , metallurgy , engineering
To develop low‐cost and efficient oxygen reduction reaction (ORR) catalysts, a novel hybrid comprising cobalt‐embedded nitrogen‐doped carbon nanotubes and nitrogen‐doped reduced graphene oxide (Co‐NCNT/NrGO‐800) was simply prepared by pyrolysis. The combination of nanotubes and graphene, and the efficient doping with cobalt and nitrogen, greatly contribute to the excellent ORR performance. This optimized Co‐NCNT/NrGO catalyst exhibits a positive onset potential of 0.91 V and a half‐wave potential of 0.82 V, combined with a relatively low peroxide yield, better durability, and better methanol tolerance than commercially available Pt/C, which makes it a promising candidate as a low‐cost and effective non‐precious‐metal ORR catalyst.
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