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Worm‐Shape Pt Nanocrystals Grown on Nitrogen‐Doped Low‐Defect Graphene Sheets: Highly Efficient Electrocatalysts for Methanol Oxidation Reaction
Author(s) -
Huang Huajie,
Ma Lulu,
Tiwary Chandra Sekhar,
Jiang Quanguo,
Yin Kuibo,
Zhou Wu,
Ajayan Pulickel M.
Publication year - 2017
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201603013
Subject(s) - materials science , graphene , electrocatalyst , methanol , catalysis , nanocrystal , oxide , carbon fibers , chemical engineering , nanoparticle , nanotechnology , electrode , electrochemistry , composite number , composite material , chemistry , metallurgy , biochemistry , organic chemistry , engineering
Although direct methanol fuel cell offers high energy use efficiency and low pollution emission, the lack of suitable electrode materials poses a great challenge to its commercial application. Herein, a facile and scalable approach is developed to fabricate a hybrid electrocatalyst consisting of strongly coupled worm‐shape Pt nanocrystals and nitrogen‐doped low‐defect graphene (N‐LDG) sheets. Interestingly, it is found that the formation of Pt nanoworms (NWs) is induced by the N atoms in the high‐quality carbon matrix, which also allows the integration of their respective structural advantages and leads to a strong synergetic coupling effect. As a result, the obtained Pt NW/N‐LDG catalyst exhibits an extremely high mass activity of 1283.1 mA mg −1 toward methanol oxidation reaction, accompanied by reliable long‐term stability and good antipoisoning ability, which are dramatically enhanced as compared with conventional Pt nanoparticle catalysts dispersed on undoped LDG, reduced graphene oxide, and commercial carbon black supports.