| FeOOH-Ni(OH)2复合材料的制备及其电催化析氧性能 |
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| 引用本文： | 涂言言,赵子涵,孙一强.FeOOH-Ni(OH)2复合材料的制备及其电催化析氧性能[J].复合材料学报,2020,37(8):1944-1950. |
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| 作者姓名： | 涂言言 赵子涵 孙一强 |
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| 作者单位： | 济南大学 化学化工学院，济南 250022 |
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| 基金项目： | 山东省自然科学基金(ZR2016BM25) |
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| 摘 要： | 以碳纤维布（CFC）为基底，通过两步法(恒电流电沉积法、溶剂热法)成功制备了FeOOH-Ni(OH)2复合材料。与FeOOH和Ni(OH)2相比，该FeOOH-Ni(OH)2复合材料作为电催化剂时，电催化析氧反应(OER)活性显著提高。在1 mol/L KOH电解质溶液中，达到10 mA·cm?2电流密度时所需要的过电位仅为270 mV，Tafel斜率为78 mV/dec，电化学阻抗谱进一步揭示了电解过程中良好的动力学特性。FeOOH-Ni(OH)2复合材料在碱性介质中具有优异的稳定性，其在高电流密度下(50 mA·cm?2)的过电势经过连续24 h的测试之后几乎没有发生明显变化。FeOOH和Ni(OH)2之间的强电子相互作用和协同效应有效提高了电导性，促进了电荷转移；此外，这种核壳结构有效增强了电催化活性面积，进而增强了其电催化析氧性能。
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| 关 键 词： | FeOOH-Ni(OH)2复合材料 核壳结构 协同效应 电催化 析氧反应 |
| 收稿时间： | 2019-03-13 |
Synthesis and electrocatalytic oxygen evolution performances of FeOOH-Ni(OH)2 composites |
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| Affiliation: | School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, China |
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| Abstract: | FeOOH-Ni(OH)2 composites were successfully prepared on carbon fiber cloth (CFC) by electrochemical deposition and hydrothermal method. The electrocatalytic oxygen evolution activity of the FeOOH-Ni(OH)2 composite is significantly improved compared with FeOOH and Ni(OH)2. The FeOOH-Ni(OH)2 electrodes require an overpotential as low as 270 mV and the tafel slope to deliver 10 mA·cm?2 for oxygen evolution reaction (OER) in 1 mol/L KOH. The electrochemical impedance spectroscopy further reveals the favorable kinetic during electrolysis. Moreover, The FeOOH-Ni(OH)2 composite has excellent stability in the alkaline medium, and its overpotential remains stable during the 24 h test at high current density(50 mA·cm?2). The strong electron interaction and synergistic reaction between FeOOH and Ni(OH)2 are enhanced effectively. The conductivity promotes the charge transfer, and the core-shell structure effectively enhances the electrocatalytic activity area, and further enhances its oxygen evolution properties. |
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