Outside Back Cover: Upcycling Water Pollutants Into Long‐Chain Polymers via Synergistic Interfacial Dechlorination and Organic Radical Stabilization

High entropy oxide nanocatalysts tune interfacial electronic structure to activate periodate through a nonradical electron-transfer pathway, converting four-chlorophenol into surface-enriched, high-molecular-weight polymeric products. Coupled radical-driven dechlorination and surface-bound hydroxyl radical substitution retain the aromatic carbon skeleton while selectively removing chlorine, enabling efficient pollutant upcycling with low oxidant demand at the liquid–solid interface. In the Research Article e3215238, Yidi Chen, Xiaoguang Duan, and co-workers.