Herein, we report an atomically dispersed Fe–N–C catalyst with axial oxygen ligands (FeN₄O/NC) synthesized for the first time by ultrafast Joule heating. The formation of oxygen species between FeN₄ and graphene offers high activity and stability for the ORR. The calculations indicate that FeN₄O/NC offers an optimal adsorption–desorption of oxygen-containing intermediates, providing a promising approach to designing efficient single-atom electrocatalysts.

中文翻译：

---

通过超快焦耳热产生轴向氧桥 FeN4O/NC，用于高效的氧还原反应


在此，我们报道了一种原子分散的 Fe-N-C 催化剂，其轴向氧配体 （FeN₄O/NC） 首次通过超快焦耳加热合成。FeN₄ 和石墨烯之间氧的形成为 ORR 提供了高活性和稳定性。计算表明，FeN₄O/NC 提供了含氧中间体的最佳吸附-解吸，为设计高效的单原子电催化剂提供了一种有前途的方法。