Enhanced Economy Utilization in Hybrid Water Electrolysis for Sustainable Hydrogen Generation

ABSTRACT Sustainable hydrogen generation through water electrolysis is vital for mitigating climate deterioration and the energy crisis. Nevertheless, industrialization is greatly constrained by the low energy utilization, resulting in substantial energy loss within the electrocatalytic system. In this review, focused on the enhanced energy utilization, the up‐to‐date advancements in the novel hybrid electrocatalysis are systemically discussed. In light of a theoretical discussion of energy efficiency in hybrid electrolysis, efficient regulation strategies are expounded for the reduced energy consumption. Special attention is placed on the interplay among the distinctive catalytic behavior, underlying reaction mechanism, and enhanced energy utilization. Valorization systems are proposed for the additional economic benefits in industrial communities, including wastewater purification, high‐valued chemical production, and seawater electrolysis. Moreover, self‐powered and self‐catalyzed electrolysis systems are also discussed for reduced electricity expense through renewable energy sources and intrinsic generated electricity. A systematic economic assessment is provided to evaluate the environmental impact and economic viability of energy‐saving hydrogen production systems. Finally, the prevailing challenges and future prospects are outlined to inspire deep investigation into enhanced energy utilization in high‐efficiency, scalable, and sustainable hydrogen generation through hybrid water electrolysis.