Modulated FeCo nanoparticle in situ growth on the carbon matrix for high-performance oxygen catalysts

Fe–Co bimetallic electrocatalysts show tremendous promise for both oxygen reduction reaction (ORR) and evolution in the alkaline medium to replace precious metal catalysts. Here, we report a successful size modulation strategy FeCo binary alloys situ growth on carbon matrix. Analogous Pt nanoparticles, could give rise increased active sites FeCo-based catalysts without altering their chemical properties. The compositionally optimized template with abundant nanotubes uniform distribution of alloy exhibits superior electrocatalytic activity by achieving high-performance half-wave potential 0.88 V toward ORR as well robust stability after 10 000 cycles. open-circuit (Voc) liquid Zn–air battery is close 1.40 which comparable that equipped Pt/C+IrO2. Our findings offer new prospects understanding particle sizes performance pyrolyzed transition metal–carbon materials.