Interfacial engineering of Co5.47N/Mo5N6 nanosheets with rich active sites synergistically accelerates water dissociation kinetics for Pt-like hydrogen evolution

A heterostructured Co5.47N/Mo5N6 catalyst on carbon cloth is created through a dip-etching and vapor nitridation process. It showcases Pt-like HER activity, reaching a potential of 44 mV at 10 mA cm−2. When used as a cathode in high-current overall water splitting, it requires only a cell voltage of 1.81 V to reach 200 mA cm−2, making it a promising candidate for industrial use. The catalyst's unique nanosheet structure with a rough surface and the synergistic effect of Co5.47N and Mo5N6 contribute to its enhanced HER performance.