Heterointerface-engineered electron-bridge in hollow carbon nanotube-anchored Fe 2 P/FeCoP electrocatalyst for highly stable Zn–air batteries

作者：Zhixian Shi, Yue Du, Zhiyi Zhong, Pan Song, Xiaonan Xu, Anwei Shi, Jijian Zhang, Dongsheng Cao, Haiyan Hu, Dongbin Xiong, Yisi Liu, Jianqing Zhou, Lina Zhou, Yao Xiao · 发表于：Nano Research · 年份：2025 · DOI：10.26599/nr.2025.94908015 · 被引用次数：5 · 研究领域：Electrocatalysts for Energy Conversion、Advanced battery technologies research、Supercapacitor Materials and Fabrication

Transition metal phosphides (TMPs) hold promise as effective bifunctional oxygen electrocatalysts for rechargeable Zn-air batteries (RZABs), yet their practical application is hindered by inadequate durability and sluggish kinetics. Herein, we design a heterophosphate composite comprising Fe 2 P-FeCoP heterojunctions anchored on 1D hollow N, P-doped carbon nanotubes (Fe 2 P-FeCoP@HNPC) through controlled metal modulation of an aniline-phytate nanorods. Critically, the interfacial electronic coupling between Fe 2 P and FeCoP induces a cross-interfacial electron-bridge network, which drives charge redistribution to accelerate interfacial electron transfer and refines the d band adsorption energetics for optimized oxygen intermediate binding. Coupled with its hollow architecture, Fe 2 P-FeCoP@HNPC enables synergistic mass/charge transfer enhancement. The synergistic electronic-structural effects endow Fe 2 P-FeCoP@HNPC with exceptional bifunctional activity, achieving a high ORR half-wave potential (0.83 V vs. RHE) and low OER overpotential (1.53 V @10 mA cm −2 ), attributed to the stabilized electron-bridge effect and hierarchical mass/charge transfer dynamics. Fe 2 P-FeCoP@HNPC assembled RZAB achieves a peak power density of 145 mW cm −2 and ultralong cycling stability (>1240 h) with negligible decay. This work demonstrates a universal strategy to harmonize electronic and structural engineering in TMPs for high-performance electrochemical energy systems.