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

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 E1/2 difference of 10 mV and a high current density equivalent to Pt/C 20 wt%.