Exploiting Electronic Metal–Support Interactions in Fe–N x /Carbon Shell‐Coated TiO ₂ Hybrids for Boosting Oxygen Reduction

Anion exchange membrane fuel cells (AEMFCs) are promising for energy conversion, but the sluggish oxygen reduction reaction (ORR) at the cathode still relies on platinum group metal (PGM) catalysts, increasing cost. Fe–N–C catalysts are widely studied as PGM‐free alternatives owing to their high initial activity, yet they often degrade during operation. In parallel, chemically stable oxides such as TiO 2 can enhance activity and durability through electronic metal–support interactions (EMSI); however, oxide supports have been used mainly with metal nanoparticles because stabilizing atomically dispersed active sites on oxides remains challenging. Here, we report a PGM‐free ORR catalyst, FePc/TiO 2 @NC, comprising atomically dispersed Fe–N x sites on a nitrogen‐doped carbon shell‐coated TiO 2 support. This structure improves the electrical conductivity and structural robustness of TiO 2 and induces strong EMSI to tune the electronic structure of the Fe sites, delivering remarkable ORR activity in alkaline media and superior stability after 5000 cycles of accelerated degradation test (ADT).