The Surface Confinement of FeO Assists in the Generation of Singlet Oxygen and High‐Valent Metal‐Oxo Species for Enhanced Fenton‐Like Catalysis

Transition metal compounds (TMCs) have long been potential candidate catalysts in persulfate-based advanced oxidation process (PS-AOPs) due to their Fenton-like catalyze ability for radical generation. However, the mechanism involved in TMCs-catalyzed nonradical PS-AOPs remains obscure. Herein, the growth of FeO on the Fe