Defect‐Rich Heterogeneous MoS₂/NiS₂ Nanosheets Electrocatalysts for Efficient Overall Water Splitting

TLDR

Designing bifunctional electrocatalysts is vital for water splitting, and rational interface engineering can modify active sites and promote electronic transfer, improving efficiency. The study designs defect‑rich MoS₂/NiS₂ nanosheets for overall water splitting and proposes that rational heterogeneous interface construction can maximize electrochemical performance and accelerate non‑precious electrocatalyst development. The nanosheets feature abundant heterogeneous interfaces that supply rich electroactive sites and facilitate electron transfer, synergistically enhancing electrocatalytic reactions. The optimized MoS₂/NiS₂ nanosheets exhibit superior bifunctional electrocatalytic performance for overall water splitting.

Abstract

Abstract Designing and constructing bifunctional electrocatalysts is vital for water splitting. Particularly, the rational interface engineering can effectively modify the active sites and promote the electronic transfer, leading to the improved splitting efficiency. Herein, free‐standing and defect‐rich heterogeneous MoS 2 /NiS 2 nanosheets for overall water splitting are designed. The abundant heterogeneous interfaces in MoS 2 /NiS 2 can not only provide rich electroactive sites but also facilitate the electron transfer, which further cooperate synergistically toward electrocatalytic reactions. Consequently, the optimal MoS 2 /NiS 2 nanosheets show the enhanced electrocatalytic performances as bifunctional electrocatalysts for overall water splitting. This study may open up a new route for rationally constructing heterogeneous interfaces to maximize their electrochemical performances, which may help to accelerate the development of nonprecious electrocatalysts for overall water splitting.