Structurally engineered highly efficient electrocatalytic performance of 3-dimensional Mo/Ni chalcogenides for boosting overall water splitting performance.

Hydrogen production from water splitting combined with renewable electricity can provide a viable solution to the energy crisis. A novel MoS ₂ /NiS ₂ /Ni ₃ S ₄ heterostructure is designed as a bifunctional electrocatalyst by facile hydrothermal method to demonstrate excellent electrocatalytic performance towards overall water splitting applications. MoS ₂ /NiS ₂ /Ni ₃ S ₄ heterostructure necessitates a low overpotential of 81 mV and 210 mV to attain a current density of 10 mA cm ^-2 during the hydrogen evolution reaction (HER) and oxygen evolution reaction (OER), respectively. Consequently, the MoS ₂ /NiS ₂ /Ni ₃ S ₄ heterostructure-based electrolyzer shows a low cell voltage of 1.54 V at 10 mA cm ^-2 . The present work highlights the significance of the heterostructure configuration of transition metal sulfide-based electrocatalysts for electrochemical overall water splitting applications.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
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