泡沫镍基三维空心球CoFe<sub>2</sub>O<sub>4</sub>@NF复合材料的制备与析氧性能研究

摘要为降低电解水阳极的析氧反应过电位，采用一步水热法制备了泡沫镍基钴铁混合氧化物（CoFe₂O₄@NF）复合材料。采用XRD、SEM、TEM和XPS等方法对复合材料进行表征，并利用三电极体系对其电解水析氧催化性能进行了测试。结果显示：CoFe₂O₄以颗粒的形式聚集成空心球结构生长于泡沫镍基底上，其中空心球的直径大约4 μm，而CoFe₂O₄的粒径约为40 nm左右。在1 mol·L^-1 KOH溶液中，CoFe₂O₄@NF复合材料仅需293 mV的过电位即可达到20 mA·cm^-2的电流密度，Tafel斜率为51 mV·dec^-1。经过1 000次循环伏安扫描和10 h电流时间曲线测试后，其析氧性能依旧保持高稳定性，在析氧催化材料领域有着广阔的研究前景。

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	王宏智
	高琪
	苏展
	于金山
	张卫国
	姚素薇

关键词：钴铁混合氧化物；泡沫镍；三维空心球结构；析氧催化反应

Abstract： CoFe₂O₄@NF composite was prepared by a simple one-step hydrothermal method to decrease the overvoltage of oxygen evolution reaction(OER). Its composition and microstructure were analyzed by XRD, SEM, TEM and XPS, and its electrocatalytic performances of oxygen evolution reaction were tested by using a three-electrode system. CoFe₂O₄ particles gathered into hollow spherical structure and grew on Ni foam(NF) substrate. The diameter of spherical is about 4 μm and the size of CoFe₂O₄ particles is 40 nm approximately. In 1 mol·L^-1 KOH solution, the CoFe₂O₄@NF composite just needs 293 mV overpotential to reach the current density of 20 mA·cm^-2 with the Tafel slope of 51 mV·dec^-1. In addition, after 1 000 CVs and 10 h I-t test, the electrocatalytic performance for OER of CoFe₂O₄@NF composite still remains high stability, which proves that the composite has a broad research prospect in the field of OER catalytic materials.

Keywords： CoFe₂O₄； Ni foam； 3D hollow spherical structure； oxygen evolution reaction

Received 2020-03-29;

Corresponding Authors: 张卫国,E-mail:zwg@tju.edu.cn。 Email: zwg@tju.edu.cn

About author: 王宏智(1973-),男,博士,副教授,现从事新能源材料研究。

引用本文:

王宏智, 高琪, 苏展, 于金山, 张卫国, 姚素薇.泡沫镍基三维空心球CoFe₂O₄@NF复合材料的制备与析氧性能研究[J]. 化学工业与工程, 2021,38(2): 61-68

Wang Hongzhi, Gao Qi, Su Zhan, Yu Jinshan, Zhang Weiguo, Yao Suwei.Research on Preparation and Electrocatalytic Performance for Oxygen Evolution Reaction of 3D Hollow Spherical CoFe₂O₄@NF Composite Based on Ni Foam[J]. Chemcial Industry and Engineering, 2021,38(2): 61-68

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