期刊
SUSTAINABLE ENERGY & FUELS
卷 4, 期 4, 页码 1933-1944出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9se01300h
关键词
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资金
- Key Research and Development Program of Shanxi [201803D421085]
- Shanxi Scholarship Council of China
- State Key Laboratory of Physical Chemistry of Solid Surfaces, Xiamen University [201912]
Developing noble-metal-free, high-efficiency, and durable electrocatalysts for both the hydrogen evolution reaction (HER) and the oxygen evolution reaction (OER) is a challenging problem in electrochemical water electrolysis. In this work, a facile continuous two-step hydrothermal method followed by electrodeposition to fabricate NiFe-LDH integrated with CoFe2O4@Co3S4 nanoflowers supported by carbon fiber paper (NiFe-CoFe2O4@Co3S4/CFP) as a full water-splitting electrocatalyst was developed. Serving as an anode catalyst, the fabricated heterostructure electrode shows extraordinary OER performance with an overpotential of 233.3 and 244.0 mV to achieve a current density of 50 and 100 mA cm(-2), respectively. Serving as a cathode catalyst, NiFe-CoFe2O4@Co3S4/CFP exhibits superior electrocatalytic activities with an overpotential of 98 mV to achieve current densities of 10 mA cm(-2). Furthermore, when serving as both the anode and cathode catalyst in an electrolyzer for overall water splitting, the as-prepared electrode only requires a cell potential as low as 1.53 V to reach a current density of 10 mA cm(-2) and excellent durability for more than 48 h in alkaline media.
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