期刊
ELECTROCHIMICA ACTA
卷 379, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2021.138146
关键词
Oxygen evolution reaction; Electrocatalysts; Hollow porous nanowires; Heterogeneous
资金
- Sichuan Science and Technology Program [2018JY0447]
The study successfully designed self-supported and hollow porous MoO3/NiF2 heterogeneous nanowires, exhibiting excellent OER catalytic performance in alkaline solution. Advanced strategies were used to enhance current density and stability in water splitting process.
Designing and constructing stable and affordable electrocatalysts with unique micro-morphology and interface for oxygen evolution reaction (OER) is crucial for efficient water splitting. Herein, self-supported and hollow porous MoO3/NiF2 heterogeneous nanowires for excellent OER catalytst have been designed via an advanced top-down strategy. Fluorinating the precursor nanowires of NiMoO4 successfully activates the Ni sites in the material and constructs porous MoO3/NiF2 heterogeneous nanowires. The hollow nanowires with abundant porous structure provide large specific surface area, while the heterogeneous interfaces cause rich electro-active sites to facilitate the electron transfer, which contribute to the significant improvement in the OER performance of the material in alkaline solution. Consequently, the catalysts of hollow porous MoO3/NiF2 nanowires grown on Ni foam deliver a current density of 100 mA cm(-2) with the overpotential of 272 mV in OER and exhibit a good durability of 50 h at high current density of 100 mA cm(-2). This study further proves that the reasonable micro-morphology construction and interface engineering design can boost up the electrocatalytic activities. (C) 2021 Elsevier Ltd. All rights reserved.
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