Highly active oxygen reduction reaction on Fe-nanoclustered hierarchical porous carbon derived from CO2

Abstract

This work presents a highly active electrocatalyst of CO₂-derived hierarchical carbon. It retains a high surface area and enables homogeneous insertion of Fe–N–C active sites for the oxygen reduction reaction. The electrocatalyst with a highly interconnected porous structure provides oxygen reduction reaction activity with an E_1/2 difference of 10 mV and a high current density equivalent to Pt/C 20 wt%.