期刊
ELECTROCHIMICA ACTA
卷 374, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2021.137962
关键词
Se-(CoFe)S-2 nanoboxes; Heterointerface/defects; Oxygen evolution reaction; Supercapacitor
资金
- National Natural Science Foundation of China [21903051, 22073061]
- China Postdoctoral Science Foundation [2018M643569]
- Natural Science Foundation of Shaanxi Province [2019JQ-671]
- Fundamental Research Funds for the Central Universities [GK201903042]
Constructing a three-dimensional hierarchically porous architecture with heterointerface and defects can effectively rich the electrochemically active sites and facilitate rapid electron transfer, leading to excellent electrochemical performance in energy storage and conversion.
The strategy of constructing a three-dimensional hierarchically porous architecture with heterointerface and defects to rich the electrochemically active site, and rapid electron transfer has been considered as an effective strategy to achieve the excellent electrochemical performance in electrochemical energy storage and conversion. Herein, a Se-doped hollow heterostructure/defects Co-Fe sulfide (Se-(CoFe)S-2) box has been developed via a facile sulfurization-selenization treatment of hollow Co-Fe Prussian blue analogues precursor. Remarkably, the abundant hierarchical macro-mesopores of hollow Se-(CoFe)S2 nanobox with excellent structural stability and unique electrical properties can not only effectively expose the electrochemically accessible active sites but also significantly improve the electrolyte transport and electron transfer, thus boosting electrochemical performances in oxygen evolution reaction (OER) and supercapacitors in alkaline media. For OER, the Se-(CoFe)S-2 electrocatalyst shows a small overpotential of 281 mV at 10 mA cm(-2) and a low Tafel slope of 51.8 mV dec(-1) as well as high stability. Furthermore, it also shows good performance for supercapacitors, suggesting its great potential as an efficient electrode for sustainable energy applications. Superb properties highlight the great prospects of PBA-based derivatives in applications of energy storage and conversion. (C) 2021 Elsevier Ltd. All rights reserved.
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