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Heavily Doped and Highly Conductive Hierarchical Nanoporous Graphene for Electrochemical Hydrogen Production
Author(s) -
Chen Linghan,
Han Jiuhui,
Ito Yoshikazu,
Fujita Takeshi,
Huang Gang,
Hu Kailong,
Hirata Akihiko,
Watanabe Kentaro,
Chen Mingwei
Publication year - 2018
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.201809315
Subject(s) - graphene , nanoporous , materials science , dopant , nanotechnology , doping , hydrogen production , electrochemistry , electrical resistivity and conductivity , catalysis , conductivity , electrical conductor , chemical engineering , substrate (aquarium) , hydrogen , inorganic chemistry , electrode , chemistry , optoelectronics , composite material , organic chemistry , oceanography , engineering , geology , electrical engineering
Heavy chemical doping and high electrical conductivity are two key factors for metal‐free graphene electrocatalysts to realize superior catalytic performance toward hydrogen evolution. However, heavy chemical doping usually leads to the reduction of electrical conductivity because the catalytically active dopants give rise to additional electron scattering and hence increased electrical resistance. A hierarchical nanoporous graphene, which is comprised of heavily chemical doped domains and a highly conductive pure graphene substrate, is reported. The hierarchical nanoporous graphene can host a remarkably high concentration of N and S dopants up to 9.0 at % without sacrificing the excellent electrical conductivity of graphene. The combination of heavy chemical doping and high conductivity results in high catalytic activity toward electrochemical hydrogen production. This study has an important implication in developing multi‐functional electrocatalysts by 3D nanoarchitecture design.