Second Coordination Shell Engineering Tunes Fe 3d Orbital Occupancy for Enhanced Oxygen Reduction Catalysis
Second coordination shell (SCS) engineering offers a powerful strategy for fine‐tuning the intrinsic activity of Fe–N‐C single‐atom catalysts, yet achieving targeted SCS regulation remains a formidable synthetic challenge. Herein, we propose a rational precursor‐engineering approach driven by the steric hindrance o...