| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Preparation of Fe-doped NiCo-LDH and Its OER Performance |
| HAN Bin1, FENG Sichen2, XU Jun2,*, LI Pengwei2,*
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1 College of Materials, Xiamen University, Xiamen 361001, China
2 College of Physical Science and Technology, Xiamen University, Xiamen 361001, China |
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Abstract Layered double hydroxide (LDH) is widely used as the oxygen evolution reaction (OER) catalyst because of its easily adjustable composition and structure. The flower-like NiCo-LDH composed of two-dimensional nanosheets was synthesized by the solvothermal method and etched by Fe ions to obtain Fe-doped NiCo-LDH. The OER activities were then evaluated, Fe-doped NiCo-LDH achieves the overpotential of 273 mV at the current density of 10 mA·cm-2, and the Tafel slope was 98 mV·dec-1, leading to improved OER performance. In addition, the Fe-doped NiCo-LDH also showed excellent long-term stability. After 16 h continuous tests, the performance can still maintain 80%. The Fe-doped NiCo-LDH nanosheets have more edge defects and can provide more edge sites as active sites. Moreover, the introduction of Fe ions changed the electronic structure of NiCo-LDH, and increased the spacing between the sheets, thus significantly improving its activity and kinetic properties.
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Published: 03 August 2021
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| Fund:National Natural Science Foundation of China (21771154), the Fundamental Research Funds for the Central Universities (20720180019). |
About author:: Bin Han received his B.E. degree in materials science and engineering from China Jiliang University in 2016, and received his M.S.degree in biomedical engineering from Xiamen University in 2020. He mainly engaged in the preparation and stability of two-dimensional nano-materials.
Jun Xu obtained his M.S.degree in biomedical engineering from Xiamen University in 2007,and received his Ph.D. degree in chemistry and biochemistry from Nanyang Technological University in 2012. He is currently a professor in the College of Physical Science and Technology, Xiamen University. His main research interests are two-dimensional materials, lithium ion battery electrode materials and photoelectric catalytic electrode materials.
Pengwei Li, Ph.D. student, College of Physical Science and Technology, Xiamen University. In July 2016, he graduated from the new energy materials and devices major of East China University of Science and Technology. In September of the same year, he entered the School of Materials Science and Technology for master's degree. In September 2019, he entered the School of Physical Science and Technology of Xiamen University for doctor's degree. His main research is to design high efficient and stable transition metal based oxygen evolution catalyst. |
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2021, Vol. 35 
