过电位
析氧
电催化剂
双功能
异质结
材料科学
线性扫描伏安法
循环伏安法
化学工程
光电子学
纳米技术
电极
催化作用
化学
电化学
物理化学
生物化学
工程类
作者
Tie Yang,Xiaolin Hu,Weikang Zheng,Zongyang Li,Dan Wu,Guanjie Lu,Qiannan Zhao,Zuguang Yang,Ronghua Wang,Chaohe Xu
出处
期刊:ACS applied energy materials
[American Chemical Society]
日期:2022-07-18
卷期号:5 (8): 9742-9749
被引量:4
标识
DOI:10.1021/acsaem.2c01417
摘要
The development of active, robust, and nonprecious electrocatalysts for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) is essential to improve the performance of Zn–air batteries (ZABs). Here, we present the FeCo2O4@FeCo2S4 heterostructure in situ decorated on Ni foam as bifunctional electrocatalysts to trigger ORR and OER. Owing to the large electrochemical active surface area and synergistic effects at interfaces, the FeCo2O4@FeCo2S4/NF exhibits an OER overpotential of 283 mV at 10 mA cm–2, excellent robustness with negligible variation during continuous linear sweep voltammetry cycles, and an onset potential (Eonset) of 0.89 V (vs RHE) for ORR. Furthermore, the FeCo2O4@FeCo2S4/NF-triggered ZAB achieves a high power density of 189.75 mW cm–2 at 10 mA cm–2. In particular, the rechargeable ZAB with FeCo2O4@FeCo2S4/NF displays a small charge–discharge voltage gap and good cycle performance of up to 227 h at 10 mA cm–2.
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