ScholarWorks@동국대학교

초록

AbstractThe development of advanced electrocatalysts for overall water splitting is crucial for enabling sustainable hydrogen production and renewable energy conversion. Among various candidates, nickel-iron layered double hydroxides (NiFe LDHs) have emerged as highly promising bifunctional catalysts for both oxygen and hydrogen evolution reactions. Owing to their rich redox chemistry, tunable composition, and earth-abundant elements, NiFe LDHs-based catalysts provide a versatile platform for bifunctional water-splitting applications. This review presents a comprehensive overview of recent design strategies for NiFe LDH-based electrocatalysts. We highlighted how microstructure-controlled architectures, such as ultrathin nanosheets, nanospheres, and hierarchical assemblies play a critical role in regulating catalytic activity, charge transfer, and reaction kinetics. In addition, the integration of NiFe LDHs with conductive substrates and carbon-based frameworks is discussed as an effective strategy to enhance electrical conductivity and structural stability. Furthermore, advanced modification strategies, including heteroatom doping, defect engineering, and surface functionalization are summarized to elucidate their roles in tailoring electronic structure and optimizing bifunctional electrocatalytic performance. Current challenges and future perspectives related to durability, scalability, and catalytic efficiency under industrially relevant operating conditions are also discussed. This review provides materials-level insights and practical design guidelines to advance NiFe LDH-based electrocatalysts toward efficient hydrogen production for overall water electrolysis. © 2026 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights are reserved, including those for text and data mining, AI training, and similar technologies.

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