Direct Growth of Highly Strained Pt Islands on Branched Ni Nanoparticles for Improved Hydrogen Evolution Reaction Activity

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  • Ali Alinezhad, The University of New South Wales, Sydney, Australien
  • Lucy Gloag, The University of New South Wales, Sydney, Australien
  • Tania M. Benedetti, The University of New South Wales, Sydney, Australien
  • Soshan Cheong, The University of New South Wales, Sydney, Australien
  • Richard F. Webster, The University of New South Wales, Sydney, Australien
  • Martin Roelsgaard
  • Bo Brummerstedt Iversen
  • Wolfgang Schuhmann, Ruhr University Bochum, Tyskland
  • J. Justin Gooding, The University of New South Wales, Sydney, Australien
  • Richard D. Tilley, The University of New South Wales, Sydney, Australien

The direct growth of Pt islands on lattice mismatched Ni nanoparticles is a major synthetic challenge and a promising strategy to create highly strained Pt atoms for electrocatalysis. By using very mild reaction conditions, Pt islands with tunable strain were formed directly on Ni branched particles. The highly strained 1.9 nm Pt-island on branched Ni nanoparticles exhibited high specific activity and the highest mass activity for hydrogen evolution (HER) in a pH 13 electrolyte. These results show the ability to synthetically tune the size of the Pt islands to control the strain to give higher HER activity.

OriginalsprogEngelsk
TidsskriftJournal of the American Chemical Society
Vol/bind141
Nummer41
Sider (fra-til)16202-16207
Antal sider6
ISSN0002-7863
DOI
StatusUdgivet - okt. 2019

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