期刊
JOURNAL OF SOLID STATE CHEMISTRY
卷 262, 期 -, 页码 181-185出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jssc.2018.03.017
关键词
NiFe LDH; Carbon materials; Nanocomposites; Quantum dots; Oxygen evolution reaction; Energy storage and conversion
资金
- Natural Science Foundation of Shandong Province [2016GGX104019]
Development of noble-metal-free catalysts towards highly efficient electrochemical oxygen evolution reaction (OER) is critical but challenging in the renewable energy area. Herein, we firstly embed NiFe LDHs quantum dots (QDs) into expanded graphite (NiFe LDHs/EG) via in-situ confined formation process. The interlayer spacing of EG layers acts as nanoreactors for spatially confined formation of NiFe LDHs QDs. The QDs supply huge catalytic sites for OER. The in-situ decoration endows the strong affinity between QDs with EG, thus inducing fast charge transfer. Based on the aforementioned benefits, the designed catalyst exhibits outstanding OER properties, in terms of small overpotential (220 mV required to generate 10 mA cm(-2)), low Tafel slope, and good durable stability, making it a promising candidate for inexpensive OER catalyst.
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