Triazine Covalent Organic Framework-Anchored Fe for Efficient Electrocatalytic Oxygen Reduction Reaction

A nitrogen-rich covalent organic framework material (SNW-1) was prepared via oil bath reflux method. Metal center Fe was introduced by a post-doping strategy, and the Fe-N-SNW-1 catalyst was synthesized through calcination. The electrocatalytic performance of this catalyst for the oxygen reduction reaction (ORR) was investigated. The crystal struc-ture and elemental chemical states of the Fe-N-SNW-1 catalyst were comprehensively characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS) and other techniques. Electrochemical tests including cyclic voltammetry (CV) and linear sweep voltammetry (LSV) were used to explore its ORR electrocatalytic activity. The results show that the Fe-N-SNW-1 catalyst exhibits a microspherical morphology, high graphitic nitrogen content, and excellent ORR electrocatalytic performance. Analysis of key electrochemical parameters indicates that the Fe-N-SNW-1 catalyst has an onset potential of 0.975 V vs. RHE and a half-wave potential of 0.841 V vs. RHE.