PGM-Zero™: Single-Site Fe-N₄ Electrocatalysts on Mesoporous Graphene for Complete Platinum Replacement in PEMFC Hydrogen Fuel Cells

Preprint presenting PGM-Zero™, an atomically dispersed Fe-N₄ electrocatalyst in a mesoporous graphitic carbon matrix (SBET ≈ 1,450 m²/g) for complete platinum replacement in PEMFC cathodes. Achieves ORR half-wave potential E1/2 = 0.915 V vs. RHE (vs. 0.920 V for Pt/C), peak power density 1.18 W/cm², loss <15 mV over 30,000 DOE AST cycles, and cuts catalyst cost by 99.9% (from US$34,000/kg to US$18.50/kg), saving US$55.8 million/year for a 50,000-stack PEMFC OEM while reducing CO₂ by 99.95%.