In this work, a category of Fe₃C-containing Fe/N/C mesoporous material has been fabricated by carbonizing the mixture of uric acid, Iron (Ⅲ) chloride anhydrous and carbon support (XC-72) under different pyrolysis temperature. Of all these samples, pyrolysis temperature (800 °C) becomes the most crucial factor in forming Fe₃C active sites which synergizes with high content of graphitic N to catalyze oxygen reduction reaction (ORR). X-ray absorption fine structure spectroscopy (XAFS) is used to exhibit that the space structure around Fe atoms in the catalyst. This kind of catalyst possesses comparable ORR properties with commercial 20% Pt/C (onset potential is 0 V vs. Ag/AgCl in 0.1 M KOH), the average transfer electron number is 3.84 reflecting the 4-electron process. Moreover, superior stability and methanol tolerance deserve to be mentioned.

在这项工作中，通过在不同的热解温度下将尿酸，无水氯化铁（Ⅲ）和碳载体（XC-72）的混合物碳化，制得了一类含Fe ₃ C的Fe / N / C介孔材料。在所有这些样品中，热解温度（800°C）成为形成Fe ₃的最关键因素C活性位点与高含量的石墨N协同作用以催化氧还原反应（ORR）。X射线吸收精细结构光谱法（XAFS）用于显示催化剂中Fe原子周围的空间结构。这种催化剂具有可比的ORR性能，市售Pt / C为20％（在0.1 M KOH中，起始电势为0 V对Ag / AgCl），平均转移电子数为3.84，反映了4电子过程。此外，值得一提的是出色的稳定性和甲醇耐受性。