Advancing Seawater Electrolysis: NiFe‐LDH‐Based Electrocatalysts for the Oxygen Evolution Reaction

Abstract Direct electrolysis of seawater has emerged as a promising route for sustainable hydrogen production. While NiFe‐layered double hydroxides (NiFe‐LDHs) have shown great potential as non‐precious oxygen evolution reaction (OER) catalysts due to their high intrinsic activity. However, several challenges hinder their practical implementation, including the sluggish reaction kinetics, complex ionic environment of seawater, and undesirable side reactions that reduce efficiency. This review provides a systematic examination of the fundamental mechanisms and key challenges of NiFe‐LDH‐based catalysts for OER in seawater. Through a critical analysis of these limitations and established evaluation criteria, essential strategies are highlighted to enhance catalytic activity, chloride corrosion resistance, and structural stability. Furthermore, design principles are outlined to advance NiFe‐LDH‐based catalysts toward industrial‐scale implementation. Finally, perspectives encompass controllable catalyst synthesis, electrolyzer mass transport optimization, and complex electrolyte adaptation, thereby providing actionable pathways to realize cost‐effective, high‐performance seawater electrolysis for sustainable hydrogen production. This review work not only provides fundamental design insights for NiFe‐LDH‐based electrocatalysts but also establishes a critical framework to bridge the gap between laboratory‐scale research and practical engineering applications.