Self-supported wire-in-plate NiFeS/CoS nanohybrids with a hierarchical structure for efficient overall water splitting

A self-supported hierarchical NiFeS/CoS nanosheet/nanowire is developed for water splitting in alkaline media. The catalyst delivers 50 and 150 mA cm⁻² at ultralow overpotentials of 170 and 150 mV toward the OER and HER, respectively.