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Platinum Nanoparticles Encapsulated in Nitrogen‐Doped Mesoporous Carbons as Methanol‐Tolerant Oxygen Reduction Electrocatalysts
Author(s) -
Guo Xin,
Li Li,
Zhang Xiaohua,
Chen Jinhua
Publication year - 2015
Publication title -
chemelectrochem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 59
ISSN - 2196-0216
DOI - 10.1002/celc.201402342
Subject(s) - methanol , electrocatalyst , mesoporous material , carbonization , catalysis , platinum , nanoparticle , materials science , platinum nanoparticles , carbon fibers , imidazolate , inorganic chemistry , chemical engineering , zeolitic imidazolate framework , oxygen , chemistry , nuclear chemistry , nanotechnology , electrochemistry , electrode , metal organic framework , organic chemistry , composite number , adsorption , scanning electron microscope , composite material , engineering
Platinum nanoparticles (Pt NPs) encapsulated in nitrogen‐doped mesoporous carbons (NMCs) are prepared by direct carbonization of zeolitic imidazolate framework‐8 (ZIF‐8)‐encapsulated Pt NPs, and used as a methanol‐tolerant oxygen reduction electrocatalyst. ZIF‐8 is used as the carbon and nitrogen precursors and as a matrix for Pt NPs. The obtained Pt NP–NMC hybrids are characterized in detail. The results show that the Pt NP–NMC hybrids possess high surface area (1226 m 2 g −1 ), abundant mesopores with narrow pore size distribution (centered at 3.9 nm), nitrogen doping (5.13 at %), and small and well‐dispersed encapsulated Pt NPs (3.7 nm). Furthermore, the prepared Pt NP–NMC catalyst exhibits high electrocatalytic activity, high stability and excellent methanol tolerance in the oxygen reduction reaction.