电催化剂
电极
电池(电)
析氧
化学工程
化学
材料科学
催化作用
电化学
过电位
纳米技术
氧还原反应
氧还原
分解水
物理化学
功率(物理)
工程类
物理
量子力学
作者
Lisi Xie,Xialiang Li,Bin Wang,Jia Meng,Haitao Lei,Wei Zhang,Rui Cao
标识
DOI:10.1002/anie.201911441
摘要
Electrodes for oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) are required in energy conversion and storage technologies. An assembly strategy involves covalently grafting Co corrole 1 onto Fe3 O4 nanoarrays grown on Ti mesh. The resulted electrode shows significantly improved activity and durability for OER and ORR in neutral media as compared to Fe3 O4 alone and with directly adsorbed 1. It also displays higher atom efficiency (at least two magnitudes larger turnover frequency) than reported electrodes. Using this electrode in a neutral Zn-air battery, a small charge-discharge voltage gap of 1.19 V, large peak power density of 90.4 mW cm-2 , and high rechargeable stability for >100 h are achieved, opening a promising avenue of molecular electrocatalysis in a metal-air battery. This work shows a molecule-engineered electrode for electrocatalysis and demonstrates their potential applications in energy conversion and storage.
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