Nanoporous Graphene with Single-Atom Nickel Dopants: An Efficient and Stable Catalyst for Electrochemical Hydrogen Production

H. J. Qiu, Yoshikazu Ito, Weitao Cong, Yongwen Tan, Pan Liu, Akihiko Hirata, Takeshi Fujita, Zheng Tang, Mingwei Chen

Research output: Contribution to journalArticle

316 Citations (Scopus)

Abstract

Single-atom nickel dopants anchored to three-dimensional nanoporous graphene can be used as catalysts of the hydrogen evolution reaction (HER) in acidic solutions. In contrast to conventional nickel-based catalysts and graphene, this material shows superior HER catalysis with a low overpotential of approximately 50 mV and a Tafel slope of 45 mV dec-1 in 0.5 M H2SO4 solution, together with excellent cycling stability. Experimental and theoretical investigations suggest that the unusual catalytic performance of this catalyst is due to sp-d orbital charge transfer between the Ni dopants and the surrounding carbon atoms. The resultant local structure with empty C-Ni hybrid orbitals is catalytically active and electrochemically stable.

Original languageEnglish
Pages (from-to)14031-14035
Number of pages5
JournalAngewandte Chemie - International Edition
Volume54
Issue number47
DOIs
Publication statusPublished - 2015 Nov 16
Externally publishedYes

Keywords

  • electrocatalysis
  • graphene
  • hydrogen evolution reaction
  • nanoporosity
  • nickel doping

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

Fingerprint Dive into the research topics of 'Nanoporous Graphene with Single-Atom Nickel Dopants: An Efficient and Stable Catalyst for Electrochemical Hydrogen Production'. Together they form a unique fingerprint.

  • Cite this