Heavily Doped and Highly Conductive Hierarchical Nanoporous Graphene for Electrochemical Hydrogen Production

Angewandte Chemie
Linghan ChenPan Liu

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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Citations

Feb 21, 2019·Advanced Materials·Rajib PaulLiming Dai
May 28, 2019·Nature Communications·Yurui XueYuliang Li
Sep 16, 2020·Chemistry : a European Journal·Ioanna K Sideri, Nikos Tagmatarchis
Aug 28, 2020·Chemical Reviews·Zhuxing SunYun Hang Hu

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