Interfacial Engineering of Advanced Electrocatalysts for Efficient Hydrogen Production via Hydrazine‐Assisted Water Electrolysis

Electrochemical water splitting for hydrogen production is limited by the slow kinetics and high energy demand of the oxygen evolution reaction (OER). Replacing OER with the hydrazine oxidation reaction (HzOR) significantly reduces the operating voltage and energy consumption. In recent years, interface engineering of electrocatalysts helps optimize electronic structures and reaction kinetics, enhancing bifunctional performance in HzOR‐assisted systems. Nevertheless, the understanding of interfacial structure–activity relationships remains insufficient. In this review, we provide an in‐depth overview of HzOR‐assisted water electrolysis, with a particular emphasis on interface engineering‐regulated electrocatalysts. The fundamental reaction mechanisms and key kinetic features of HER and HzOR are first discussed, followed by a detailed summary of catalyst design strategies. Furthermore, the practical potential of HzOR‐assisted hydrogen production is highlighted from multiple perspectives, including self‐powered hydrogen generation systems and seawater electrolysis. Finally, the remaining challenges are critically analyzed, and future research directions are proposed for sustainable hydrogen production technologies.