Hybrid of Fe3O4 nanorods and N-doped carbon as efficient oxygen reduction electrocatalyst

摘要: Abstract Cost-effective electrocatalyst as alternative to Pt for the oxygen reduction reaction (ORR) is one of key requirements viable fuel cells. Hybrids metal oxides and nitrogen (N)-doped carbon (NC) are promising candidates, while effective synthesizing methods highly expected. We report an efficient hybridization Fe3O4 NC by simply annealing FeOOH nanorods together with urea at a relatively low temperature (500 °C). The ingeniously chosen act reductant convert into source form on same time; Fe species in FeOOH/Fe3O4 catalyze from NC. Such synergetic effects vital hybrid formation. as-synthesized exhibits attractive ORR activity, onset potential ∼0.915 V (vs. RHE) half-wave 0.806 V alkaline media, which superior that reported so far Fe3O4-based materials N-doped carbons.