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Controlling hydrogen evolution reaction activity on Ni core-Pt island nanoparticles by tuning the size of the Pt
Ali Alinezhad1, Tania M Benedetti, Jiaxin Lian
1School of Chemistry, University of New South Wales, Sydney, NSW 2052, Australia. r.tilley@unsw.edu.au.
Abstract:
Pt islands with different sizes were grown on amorphous Ni nanoparticles, allowing the tuning of the Pt-Ni interface without changing the hydrogen binding energy of the Pt sites. As a result, the HER activity of the electrocatalysts increases by decreasing the size of the Pt islands due to the greater surface area of the Pt-Ni interfaces.
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Metals like palladium, platinum, and nickel are commonly used in their solid forms — fine powder on an inert surface. As these catalysts remain insoluble in the reaction mixture, they are referred to as heterogeneous catalysts.
The hydrogenation process takes place on the surface of...

