Abstract
Synthesized by dripping iron acetate into the N-doped carbon film enriched with pyridinic N and followed by annealing at 800°C, Fe–N-doped amorphous carbon (dFe–N-C) with an Fe content of 0.2at.% showed excellent electrocatalytic activity, stability and methanol tolerance via a four-electron pathway for oxygen reduction reaction (ORR), which outperformed commercial Pt/C catalyst. More importantly, by tuning the Fe content and annealing temperature, the trace Fe in dFe–N-C was supposed to form high active FeN4 sites with pyridinic N and played an important role in the excellent electrocatalytic performance for ORR.
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