双功能
催化作用
析氧
材料科学
纳米点
复合数
层状双氢氧化物
化学工程
锌
咪唑酯
无机化学
纳米技术
化学
电极
冶金
电化学
复合材料
有机化学
物理化学
工程类
作者
Sijing Zhang,Lei Yang,Tingting Yang,Yifu Song,Tingyun Wang,Juan Yang,Yongchun Liu,Xiangyang Zhou,Jingjing Tang
标识
DOI:10.1016/j.coco.2023.101757
摘要
An efficient bifunctional oxygen catalyst for both oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is crucial for the widespread application of rechargeable zinc-air batteries (ZABs) with high energy density and low-cost electrically. Herein, we report an effective pomegranate-like structured FeNi–N–C@FeNi LDH catalyst using Zeolitic Imidazolate Framework (ZIF-8) as precursor via pyrolysis and hydrothermal reactions. The as-prepared FeNi–N–C@FeNi LDH composite, consisting of FeNi-nanodots embedded in carbon matrix and metal layered double hydroxides (LDHs) as outer layer, exhibits preferable performance toward ORR (E1/2 = 0.890V) and OER (Ej = 10 = 1.535V) compared to precious metal-based catalysts. Moreover, when being applied in ZABs, the FeNi–N–C@FeNi LDH composite displays a high open-circuit voltage of 1.497 V and a durability of up to 100 h, demonstrating its great possibility in practical application.
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