期刊
CHEMICAL ENGINEERING JOURNAL
卷 404, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2020.127111
关键词
MOF composite; MOF derivative; Electrochemical application; Oxygen evolution reaction; Supercapacitor
资金
- National Natural Science Foundation of China [21871156]
- Zhejiang Provincial Natural Science Foundation of China [LY18B010004]
- Natural Science Foundation of Ningbo [2017A610065, 2018A610066]
- Zhejiang Provincial Education Fund of China [Y201737172]
- K.C. Wong Magna Fund in Ningbo University
The study successfully designed and fabricated a series of bimetallic metal-organic framework hybrid materials with remarkable electrochemical performance, among which the FeMOF/NiMOF/NF composite exhibited the best oxygen evolution reaction performance and exceptional electrochemical stability.
Developing highly efficient and stable multi-functional metal-organic framework electrochemical materials is of prime importance for renewable energy technologies and electrocatalytic applications. Herein, a novel series of bimetallic metal-organic framework (MOF) hybrid materials were successfully designedly fabricated through an in-situ growth and MOF-on-MOF strategies, namely as NiFeMOF/NF, NiCoMOF/NF, FeMOF/NiMOF/NF, and CoMOF/NiMOF/NF. Benefiting from the synergistic effect of bimetallic centers, conductive substrate and unique fabrication, they exhibit remarking electrochemical performance. Among them, FeMOF/NiMOF/NF composite with ultrathin nanosheets displays the best electrochecatalytic performance with ultralow overpotentials of 293 mV at 50 mA cm(-2) and 359 mV at 100 mA cm(-2) for oxygen evolution reaction (OER), and remarking electrochemical stability with high current density of 100 mA cm(-2) after testing for 24 h, that 88% of initial current density can be remained. Based on these fabricated bimetallic MOF hybrid materials as precursors, the corresponding MOF-derived nano sulfides were obtained with massive exposure of active sites. As an excellent supercapacitor electrode, NiCoS/NF-1 converted from CoMOF/NiMOF/NF shows admirable specific capacitance of 2815.4 F g(-1) at 1 mA cm(-2) and a remarkable rate capability of 82%.
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