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Nanosheets/Mesopore Structured Co 3 O 4 @CMK‐3 Composite as an Electrocatalyst for the Oxygen Reduction Reaction
Author(s) -
Gan Lang,
Wang Mengran,
Hu Langtao,
Fang Jing,
Lai Yanqing,
Li Jie
Publication year - 2018
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201701822
Subject(s) - electrocatalyst , catalysis , mesoporous material , materials science , oxide , carbon fibers , pyrolysis , methanol , electrochemistry , transition metal , graphene , chemical engineering , metal , inorganic chemistry , composite number , nanotechnology , chemistry , electrode , organic chemistry , composite material , metallurgy , engineering
The exploration of highly effective and low‐cost non‐noble‐metal electrocatalysts for the oxygen reduction reaction (ORR) will have a significant impact on the area of fuel cells and metal–air batteries. Here, we report a facile, efficient, and environmentally friendly method to deposit transition metal oxide nanosheets (NSs) on the backbone of ordered mesoporous carbon (CMK‐3) by the pyrolysis of the metal‐precursor@CMK‐3. The optimized CMK‐3 catalyst with a coating of Co 3 O 4 NSs possesses a high surface area of 2396 m 2 g −1 and demonstrates an excellent electrocatalytic activity towards the ORR in alkaline media, which is much better than that of other transition metal oxide@CMK‐3 catalysts and other carbon‐based catalysts (such as carbon nanotubes). In addition, the as‐prepared catalyst possesses a comparable electrochemical performance and a superior durability and higher tolerance to methanol compared with commercially available Pt/C, which can be ascribed to the distinctive structure of the nanosheets and mesopores, indicative of potential applications in metal–air batteries.