Direct Growth of Highly Strained Pt Islands on Branched Ni Nanoparticles for Improved Hydrogen Evolution Reaction Activity
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Gloag, Lucy
Benedetti, Tania M
Cheong, Soshan
Webster, Richard F
Roelsgaard, Martin
Iversen, Bo B
Schuhmann, Wolfgang
Gooding, J Justin
Tilley, Richard D
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Abstract
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.
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Journal of the American Chemical Society
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141
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41
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This document is the Accepted Manuscript version of a Published Work that appeared in final form in the Journal of the American Chemical Society, copyright 2019 American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://doi.org/10.1021/jacs.9b07659
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Chemical sciences
Science & Technology
Physical Sciences
Chemistry, Multidisciplinary
Chemistry
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Alinezhad, A; Gloag, L; Benedetti, TM; Cheong, S; Webster, RF; Roelsgaard, M; Iversen, BB; Schuhmann, W; Gooding, JJ; Tilley, RD, Direct Growth of Highly Strained Pt Islands on Branched Ni Nanoparticles for Improved Hydrogen Evolution Reaction Activity, Journal of the American Chemical Society, 2019, 141 (41), pp. 16202-16207