▎ 摘　　要

Development of high-efficiency and stable electrocatalysts for oxygen reduction reaction (ORR) is significant for commercial manufacturing of fuel cells. Herein, graphene-wrapped FePt alloyed nanoparticles anchored on Ndoped hierarchically porous graphitic carbon nanoflakes (G-FePt@N-GCFs) were prepared by confined pyrolysis of the mixed metal precursors and dicyandiamide. Notably, dicyandiamide in situ polymerized to graphitic carbon nitride to further adsorb and confine metal ions, finally harvesting graphene-wrapped FePt nanoparticles under high temperature, accompanied by forming the N-doped graphitic carbon nanoflakes. The controlled experiments substantiate significance of the pyrolysis temperature and metal types. The resultant G-FePt@NGCFs showed appealing ORR activity (Eonset = 1.01 V; E1/2 = 0.86 V vs. RHE), and durability (E1/2 negatively shifts for 12 mV within 2000 cycles), outperforming commercial Pt/C catalyst in the alkaline environment. This study provides some valuable guidelines for construction of state-of-art transition-metal-based carbon catalysts in energy storage and conversion devices.