Oxygen reduction reaction (ORR) is the core reaction of energy conversion devices, such as proton exchange membrane fuel cells and Al-air batteries. Thus, there is an urgent demand for efficient and stable electrocatalysts to accelerate the ORR process. In this study, we present a novel method for preparing Fe-Nx catalysts through the use of electrospinning technology. The catalyst has a one-dimensional fiber structure. Succinonitrile (SN) is used as a complexing agent to stable Fe ions and prevent them from agglomerating during carbonization, thereby forming high-density Fe-Nx sites. The Fe₃C nanoparticles produced during pyrolysis can improve the catalytic activity of the Fe-Nx site. The performance of the catalyst was evaluated using a rotating disk electrode (RDE) test in a 0.1 M KOH solution, exhibiting a half-wave potential of 0.925 V vs RHE, which surpasses that of the commercial Pt/C electrode (0.86 V). The assembled aluminum-air battery has an open potential of 2.01 V and a maximum power of 98 mW/cm². This work provides an innovative method for the direct preparation of Fe–N–C catalysts via electrospinning.

氧还原反应（ORR）是质子交换膜燃料电池、铝空气电池等能量转换装置的核心反应。因此，迫切需要高效稳定的电催化剂来加速ORR过程。在这项研究中，我们提出了一种通过使用静电纺丝技术制备 Fe-Nx 催化剂的新方法。该催化剂具有一维纤维结构。丁二腈 (SN) 用作络合剂以稳定 Fe 离子并防止它们在碳化过程中团聚，从而形成高密度的 Fe-Nx 位点。铁₃热解过程中产生的 C 纳米颗粒可以提高 Fe-Nx 位点的催化活性。在 0.1 M KOH 溶液中使用旋转圆盘电极 (RDE) 测试评估催化剂的性能，半波电位为 0.925 V vs RHE，超过商业 Pt/C 电极（0.86 V）。组装好的铝空气电池开路电位为2.01V，最大功率为98mW/cm ²。这项工作为通过静电纺丝直接制备Fe-N-C催化剂提供了一种创新方法。