Fe 2 P/SbZn Heterostructure on N,P‐Doped Carbon Scaffolds as Advanced Oxygen Reduction Electrocatalysts for Zinc–Air Batteries

作者：Qingmeng Guo, Fengting Li, Chongxi Zhang, Zhikun Wang, Zixi Kang, Lili Fan, Daofeng Sun · 发表于：Small · 年份：2025 · DOI：10.1002/smll.202507424 · 被引用次数：2 · 研究领域：Electrocatalysts for Energy Conversion、Advanced battery technologies research、Fuel Cells and Related Materials

Abstract The strategic construction of heterostructures centered around Fe 2 P is proven to be effective for improving its performance in the oxygen reduction reaction (ORR) and zinc–air batteries (ZABs). In this study, SbZn is strategically employed to construct a novel Fe 2 P/SbZn heterostructure on N,P‐doped carbon scaffolds, serving as an efficient electrocatalyst for the ORR in ZABs. Through a one‐step pyrolysis of a Fe, Sb, P‐incorporated zeolitic imidazolate framework, the Fe 2 P/SbZn@PNC catalyst is successfully synthesized. This catalyst demonstrates high ORR activity in alkaline media, achieving a half‐wave potential of 0.936 V and a limiting current density of 6.18 mA cm −2 , both significantly surpassing those of commercial 20 wt% Pt/C. When applied in zinc–air batteries, the Fe 2 P/SbZn@PNC‐based ZABs deliver a higher peak power density and superior long‐term cycling stability compared to the Pt/C benchmark. Density functional theory (DFT) calculations reveal that the Fe 2 P/SbZn interface drives charge redistribution, optimizing the adsorption/desorption of oxygen intermediates and reducing the rate‐determining energy barrier in ORR, thus enhancing catalytic activity. This innovative heterostructure provides new avenues for designing efficient electrocatalysts for energy conversion and storage.