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

Alinezhad, A. and Gloag, L. and Benedetti, T.M. and Cheong, S. and Webster, R.F. and Roelsgaard, M. and Iversen, B.B. and Schuhmann, W. and Gooding, J.J. and Tilley, R.D.

Volume: 141 Pages: 16202-16207
DOI: 10.1021/jacs.9b07659
Published: 2019

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. Copyright © 2019 American Chemical Society.

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