Zn‐Doped NiFe Layered Double Hydroxide as a Highly Efficient and Stable Electrocatalyst for Seawater Oxidation

Direct seawater electrolysis holds significant promise due to its economic viability and sustainability of resources. The presence of excessive Cl − in seawater poses significant challenges, underscoring the necessity for electrocatalysts with superior catalytic efficiency and strong corrosion resistance. Herein, a Zn‐doped NiFe layered double hydroxide nanosheet array supported on nickel foam (Zn‐NiFe LDH@NF) is developed as an efficient electrocatalyst for seawater oxidation. The formation of Zn(OH) 4 2− in alkaline seawater plays a crucial role in excluding Cl − and preventing ClO − generation, thereby boosting the long‐term stability of the catalyst. The Zn‐NiFe LDH@NF catalyst achieves impressive performance, delivering a current density of 1 A cm −2 at a low overpotential of 341 mV and demonstrating excellent durability over 1000 h. These findings demonstrate that the incorporation of Zn significantly enhances the oxygen evolution reaction performance and durability of NiFe LDH‐based catalysts for seawater oxidation, offering valuable insights for the advancement of seawater electrolysis systems.