High-entropy sulfides as an oxygen evolution catalyst for anion exchange membrane water electrolyzers

Abstract

A high-entropy sulfide (NiFeCoCrZr)S/C is synthesized via carbothermal shock, which exhibits high oxygen evolution reaction catalytic performance with a low overpotential of 271 mV to achieve a current density of 100 mA cm⁻² and low potential degradation rate of 94 µV h⁻¹ over 300 h of testing, showcasing the promise of high-entropy materials for water electrolysis anodes.