Low-Cost Synthesis of Atomically Dispersed Fe–Mn Dual-Site Single-Atom Catalysts for Oxygen Reduction in Zn–Air Batteries

作者：Yaxuan Wang, Lijuan Cao, Yadong Li, Han‐Pu Liang · 发表于：ACS Applied Energy Materials · 年份：2025 · DOI：10.1021/acsaem.5c02407 · 被引用次数：1 · 研究领域：Electrocatalysts for Energy Conversion、CO2 Reduction Techniques and Catalysts、Advanced battery technologies research

Single-atom-based electrocatalysts have gained widespread interest due to their effectiveness in promoting the oxygen reduction reaction (ORR). Single-atom electrocatalysts remain limited in application due to their reliance on costly and complex materials and fabrication processes. Herein, we introduce an inexpensive general complexation–pyrolysis-based route for the mass production of Fe 1 Mn 1 /NC, an atomically dispersed bimetallic electrocatalyst. 1,10-Phenanthroline (phen), functioning as both a metal-complexing ligand and nitrogen source, was combined with inexpensive BP 2000 carbon black used as the carbon matrix. A homogeneous dispersion of Fe 2+, Mn 2+, and 1,10-phenanthroline with BP 2000 carbon black was prepared in methanol, followed by solvent removal and subsequent pyrolysis, which enabled the generation of a high density of MN x active centers within the carbonaceous matrix. The synthesized Fe 1 Mn 1 /NC electrocatalyst exhibited remarkable oxygen reduction performance, as evidenced by half-wave potentials of 0.936 V in 0.1 M KOH and 0.78 V in 0.1 M HClO 4 . Furthermore, when applied as the cathodic electrocatalyst in a Zn–air battery, Fe 1 Mn 1 /NC enabled a remarkable performance output, including a peak power density of 189 mW cm –2, a specific capacity of 781.2 mA h gZn –1, and prolonged operational durability beyond 400 h. This study revealed that inexpensive raw materials are capable of generating highly catalytically active sites under appropriate condi...