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Pristine‐Graphene‐Supported Nitrogen‐Doped Carbon Self‐Assembled from Glucaminium‐Based Ionic Liquids as Metal‐Free Catalyst for Oxygen Evolution
Author(s) -
Zhao Ming,
Li Tianhao,
Jia Lichao,
Li Huilin,
Yuan Weiyong,
Li Chang Ming
Publication year - 2019
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201901961
Subject(s) - catalysis , graphene , oxygen evolution , ionic liquid , materials science , carbon fibers , chemical engineering , ionic bonding , metal , inorganic chemistry , oxygen , nanotechnology , chemistry , electrochemistry , electrode , ion , composite number , organic chemistry , composite material , engineering , metallurgy
Abstract For the first time, graphene‐supported N‐doped carbon (G@NC) with a high degree of N doping was synthesized by in situ self‐assembly of a glucaminium‐based ionic liquid on pristine graphene under hydrothermal conditions. This 2D, metal‐free nanohybrid exhibited much higher catalytic activity than most reported metal‐free catalysts for the oxygen evolution reaction (OER) and even state‐of‐the‐art Ir‐ and Ru‐based catalysts because the high content of graphitic N greatly increased the number of OER‐active sites, the pristine graphene significantly promoted the OER activity of the C sites adjacent to the graphitic N atoms, and N‐doped graphitic carbon remarkably enhanced the charge‐transfer rate. This work not only creates a facile and economical approach to controllably fabricate pristine‐graphene‐supported carbon with a high N‐doping level for the development of highly efficient metal‐free OER catalysts but also provides insight into the mechanisms for both the in situ self‐assembly and the high OER catalytic activity of G@NC.