Crystalline/amorphous nickel sulfide interface for high current density in alkaline HER: surface and volume confinement matters

In this work, we demonstrate an interface on porous nickel foam (NN) between crystalline nickel sulfide and amorphous nickel sulfide (NNS/NNS x ) adapting simple hydrothermal and facile electrodeposition processes, respectively. The developed electrocatalyst required a low overpotential of 15 mV to...

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Bibliographic Details
Published in:Chemical communications (Cambridge, England) England), 2024-06, Vol.6 (53), p.6817-682
Main Authors: Sagayaraj, Prince J. J, Sekar, Karthikeyan
Format: Article
Language:English
Subjects:
Current density
Electrocatalysts
Hydrogen evolution reactions
Metal foams
Nickel sulfide
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Summary:In this work, we demonstrate an interface on porous nickel foam (NN) between crystalline nickel sulfide and amorphous nickel sulfide (NNS/NNS x ) adapting simple hydrothermal and facile electrodeposition processes, respectively. The developed electrocatalyst required a low overpotential of 15 mV to deliver a current density of 10 mA cm −2 and the interface intrinsically activates the electrocatalyst with an onset overpotential comparable to that of Pt in an alkaline hydrogen evolution reaction. In this report, we have developed a novel CA interface between crystalline and amorphous nickel sulfide which required a low overpotential of 15 mV for 10 mA cm −2 with the intrinsic activation for alkaline hydrogen evolution reaction.
ISSN:1359-7345
1364-548X
1364-548X
DOI:10.1039/d4cc01782j