Fe‐doped Ni3S2@CoSx nanoarrays derived from MOF as bifunctional electrocatalysts for efficient overall water splitting

Abstract

AbstractBackgroundFabricating high‐performance bifunctional electrocatalysts remains challenging to promote the development of electrocatalytic water splitting.ResultA heterostructure Fe‐Ni3S2@CoSx/NF was successfully synthesized by using interfacial engineering strategy. Benefiting from the strong synergistic effect between highly active CoSx and Fe‐Ni3S2, Fe‐Ni3S2@CoSx/NF exhibited outstanding bifunctional performance, which showed low overpotentials of 77 mV for HER and 217 mV for OER at 10 mA cm−2, respectively.ConclusionThe CoSx nanoarrays and Fe‐Ni3S2 nanosheets respectively served as HER and OER active center. When Fe‐Ni3S2@CoSx/NF was used as both cathode and anode for overall water splitting, a low voltage of 1.52 V was required to reach the current density of 10 mA cm−2 with nearly 100% Faradic efficiency and outstanding durability.This article is protected by copyright. All rights reserved.