Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 54, Issue 47, Pages 14031-14035Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201507381
Keywords
electrocatalysis; graphene; hydrogen evolution reaction; nanoporosity; nickel doping
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Funding
- JST-CREST (Phase Interface Science for Highly Efficient Energy Utilization)
- JST (Japan)
- MEXT
- National Science Foundation of China [61425004, 61227902, 11175066]
- JSPS postdoctoral fellowship program [P12054]
- Austrian Science Fund (FWF) [P12054] Funding Source: Austrian Science Fund (FWF)
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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 over-potential 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.
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