The N-anchoring effect in NH₂-functionalized MOF-derived iron-carbon nanomaterials for oxygen reduction

The incorporation of an iron source into NH₂-MOF-5, followed by thermal decomposition, yields a porous metal-carbon catalyst (MOF5A-Fe@NC). This catalyst possesses significant N content, a high degree of graphitization, and abundant Fe-N sites, which contribute to enhanced oxygen reduction. Specifically, the obtained MOF5A-Fe@NC demonstrates a positive onset potential (0.972 V), a substantial limiting current density (4.815 mA cm^-2), and a small Tafel slope (58.7 mV dec^-1), and maintains a high current retention of 96.3% after 10 hours.