FeSe₂/NiSe₂ Supported on NiCo-LDH Nanosheets for Enhanced Water Electrolysis Performance

Alkaline water electrolysis is a promising avenue for hydrogen and oxygen production. Yet, the pursuit of highly efficient nonprecious electrocatalysts to drive the hydrogen evolution reaction and oxygen evolution reaction persists as a formidable obstacle. Herein, we present a viable method for constructing a catalyst utilizing distinct interfacial interfaces. Within this catalyst, NiSe2 and FeSe2 are anchored onto NiCo-LDH nanosheets, potentially enhancing the inherent properties of the catalyst and demonstrating remarkable performance across various aspects of water electrolysis. Specifically, it exhibits impressive efficiency in both the OER and HER, displaying overpotentials of 256 and 176 mV, respectively, at 50 mA cm–2. Moreover, it promotes complete splitting of water, achieving 50 mA cm–2 at a potential of 1.63 V under alkaline conditions. Additionally, the NiCo-LDH/FeSe2/NiSe2 catalyst showcases notable attributes such as a substantial electrochemically active surface area and prolonged stability. Given the reported performance, this research provides valuable perspectives on the contributions of multiphase materials to the advancement of water electrolysis technology.