摘要
通过MOF(ZIF-8)衍生碳的笼限域效应调控Fe/Fe_(3)C纳米颗粒的生长与分散,构建Fe与Fe_(3)C的协同活性中心,相比Fe基催化剂,实现0.886 V的超高ORR半波电位(E_(1/2 RHE))(比商业Pt/C高55 mV),且液态、柔性固态锌空气电池在5 mA·cm^(-2)下分别达超350、90 h长期循环稳定性,突破传统Fe基催化剂易团聚、稳定性差的核心瓶颈;相较于已报道的Fe基催化剂,1)借助ZIF-8笼限域结构解决Fe基活性颗粒团聚问题,且Fe/Fe_(3)C协同作用提升催化动力学,半波电位显著优于多数Fe基材料且超Pt/C;2)基于该催化剂的锌空气电池循环稳定性远超多数Fe基催化剂组装电池,且无需依赖昂贵的Pt基材料,为非贵金属催化剂实用化提供更优路径。
The growth and dispersion of Fe/Fe_(3)C nanoparticles were regulated by the cage confinement effect of carbon derived from MOF(ZIF-8),constructing a synergistic active center of Fe and Fe_(3)C.Compared with Fe-based catalysts,it achieved an ultra-high ORR half-wave(E_(1/2 RHE))potential of 0.886 V(55 mV higher than commercial Pt/C),and the liquid and flexible solid-state Zinc-air batteries achieved long-term cycling stability of over 350 h and 90 h respectively at 5 mA cm^(-2),breaking through the core bottleneck of traditional Fe-based catalysts that are prone to agglomeration and have poor stability.Compared with the reported Fe-based catalysts,firstly,it not only solved the agglomeration problem of Fe-based active particles by taking advantage of the cage confinement structure of ZIF-8,but also enhanced the catalytic kinetics through the synergistic effect of Fe/Fe_(3)C,with a half-wave potential significantly superior to most Fe-based materials and even surpassing Pt/C;secondly,the cycling stability of Zinc-air batteries based on this catalyst far exceeded that of most Fe-based catalysts,and it did not rely on expensive Pt-based materials,providing a better path for the practical application of non-noble metal catalysts.
作者
杨长根
黄勇
袁庆龙
张甲乐
YANG Changgen;HUANG Yong;YUAN Qinglong;ZHANG Jiale(School of Mechanical Engineering,Shangqiu Institute of Technology,Shangqiu 476000,China)
出处
《镇江高专学报》
2026年第1期82-93,共12页
Journal of Zhenjiang College
关键词
氮碳基
Fe纳米颗粒催化剂
锌空气电池
nitrogen carbon base
Fe nanoparticle catalyst
Zinc-air battery
