Phosphorus‐Modified High‐Entropy Layered Double Hydroxide for Enhanced Electrocatalytic Oxygen Evolution via d‐Band Center Modulation

and maintains stability for 100 h in 1 M KOH. In situ Raman spectroscopy shows the formation of highly active Ni(Fe)OOH species during OER. This work offers a novel strategy for designing efficient water-splitting catalysts through in situ heteroatom modification, advancing high-entropy materials in electrocatalysis.