Implanting an Electron Donor to Enlarge the d–p Hybridization of High‐Entropy (Oxy)hydroxide: A Novel Design to Boost Oxygen Evolution

), as well as good electrochemical stability. The favorable activity of the electron donor and underlying synergistic "cocktail effect" are demonstrated and disclosed. This work opens up a new strategy to guide the design/fabrication of advanced HE electrocatalysts.