biostudies-literatureUnknown16(35)Liu CSeawater electrolysis for hydrogen production harnesses renewable energy sources, contributing to sustainable development. However, competing anodic reactions, such as the chloride oxidation reaction (ClOR), can adversely affect the activity and stability of the oxygen evolution reaction (OER). In this study, we propose a strategy that significantly enhances the OER activity and selectivity of NiFe-layered double hydroxides (LDHs) by incorporating chromium (Cr) (Cr-NiFeLDHs). The Cr-NiFeLDH anode demonstrates an impressive overpotential of only 349 mV at a current density of 1000 mA cm^-2, outperforming RuO₂ in industrial applications and maintaining stability for over 140 h in anion exchange membrane (AEM) electrolyzer tests. Quasi <i>in situ</i> characterization reveChemical science16321-16330https://www.ebi.ac.uk/biostudies/studies/S-EPMC12355219biostudies-literatureStabilizing NiFe active sites using a high-valent Lewis acid for selective seawater oxidation.PMC12355219Liu XWu ZZhu JQin JLiu CTeng ZZhang RChi JWang LfalseStabilizing NiFe active sites using a high-valent Lewis acid for selective seawater oxidation.Seawater electrolysis for hydrogen production harnesses renewable energy sources, contributing to sustainable development. However, competing anodic reactions, such as the chloride oxidation reaction (ClOR), can adversely affect the activity and stability of the oxygen evolution reaction (OER). In this study, we propose a strategy that significantly enhances the OER activity and selectivity of NiFe-layered double hydroxides (LDHs) by incorporating chromium (Cr) (Cr-NiFeLDHs). The Cr-NiFeLDH anode demonstrates an impressive overpotential of only 349 mV at a current density of 1000 mA cm^-2, outperforming RuO₂ in industrial applications and maintaining stability for over 140 h in anion exchange membrane (AEM) electrolyzer tests. Quasi <i>in situ</i> characterization reve2025-01-01T00:00:00Z2025 Sep2026-06-03T06:43:23.349Z2026-04-25T03:22:08.516ZS-EPMC123552194082209910.1039/d5sc02818c