Fe₃O₄-Encapsulating N-doped porous carbon materials as efficient oxygen reduction reaction electrocatalysts for Zn–air batteries

Abstract

Fe₃O₄ nanoparticle-encapsulating N-doped porous carbon was synthesized. Owing to the large specific surface area, hierarchical porous structure, and sufficient number of active sites from the graphitic carbon wrapped Fe₃O₄ NPs as well as the joint effect with Fe-N_x moieties, the as-prepared 2D-Fe₃O₄@FeNC-700 electrocatalyst exhibits exceptional performance in Zn-air batteries.