Heavily Doped and Highly Conductive Hierarchical Nanoporous Graphene for Electrochemical Hydrogen Production |
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| Authors: | Linghan Chen Dr Jiuhui Han Dr Yoshikazu Ito Dr Takeshi Fujita Dr Gang Huang Kailong Hu Dr Akihiko Hirata Dr Kentaro Watanabe Prof Mingwei Chen |
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| Institution: | 1. WPI Advanced Institute for Materials Research, Tohoku University, Sendai, Japan;2. Institute of Applied Physics, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Japan;3. PRESTO (Japan) Science and Technology Agency, Saitama, Japan;4. Department of Materials Science and Engineering, Johns Hopkins University, Baltimore, MD, USA |
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| Abstract: | 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. |
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| Keywords: | chemical doping chemical vapor deposition electrical conductivity graphene hydrogen evolution reaction |
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