Three-dimensional hierarchical meso/macroporous Fe/Co-nitrogen-doped carbon encapsulated FeCo alloy nanoparticles prepared without any template or surfactant: High-performance bifunctional oxygen electrodes

Three-dimensional hierarchical meso/macroporous Fe/Co-nitrogen-doped carbon encapsulated FeCo alloy nanoparticles prepared without any template, surfactant, or etching procedures has acted as an efficient bi-functional catalyst with a relatively low over-potential of 0.813 V for oxygen reduction and evolution reaction.356