| 三维Ni(OH)2/Ni@N掺杂还原氧化石墨烯复合电极的制备及电催化析氢性能 |
| Three Dimensional Ni(OH)2/Ni@N-Doped Reduced Graphene Oxide Composite Electrodes as an Electrocatalyst for Hydrogen Evolution Reaction |
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| 摘要: 采用脱合金结合两步水热法将3D Ni （OH）2/Ni与N掺杂还原氧化石墨烯（rGO）结合，成功制备出3D花状Ni （OH）2/Ni@NG复合电极。通过X射线衍射（XRD）、X射线光电子能谱（XPS）、扫描电子显微镜（SEM）和透射电子显微镜（TEM）表征其物相、价态分布及微观结构。在1 mol·L-1 KOH溶液中测试其电催化析氢反应（HER）性能。结果表明：Ni （OH）2/Ni的3D结构增加了电极的活性面积，与N掺杂rGO复合显著提高了电子/离子的传输速率，其过电位为108 mV （η10），Tafel斜率为114.9 mV·dec-1，表现出良好的HER催化活性。1 000圈循环伏安法及计时电位法测试表明，Ni （OH）2/Ni@NG电极均表现出良好的稳定性。 |
| 关键词: 脱合金 两步水热法 电催化析氢 |
| 基金项目: 国家自然科学基金（No.51661018）资助 |
| Abstract: In this work, 3D flower-like Ni(OH)2/Ni@NG composite electrodes were prepared by combining 3D Ni(OH)2/Ni with nitrogen-doped reduced graphene oxide(rGO)using de-alloying and two-step hydrothermal synthesis.Characterization of the phase, valence distribution, and microstructure of electrodes by X-ray diffraction(XRD), X-ray photoelectron spectroscopy(XPS), scanning electron microscopy(SEM), and transmission electron microscopy(TEM).In addition, the electrocatalytic hydrogen evolution reaction(HER)performance was tested in 1 mol·L-1 KOH solution.The results showed that the three-dimensional structure of Ni(OH)2/Ni increased the active area of the electrode, and the complexation with N-doped rGO significantly improved the electron/ion transport rate with an overpotential of 108 mV(η10)and a Tafel slope of 114.9 mV·dec-1, which exhibited good HER catalytic activity.The Ni(OH)2/Ni@NG electrode showed good stability by both the 1 000-turn cyclic voltammetry method and the chronopotentiometry test. |
| Keywords: de-alloying two-step hydrothermal synthesis electrocatalytic hydrogen evolution |
| 投稿时间：2022-03-09 修订日期：2022-05-23 |
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| 周琦,雒有成.三维Ni(OH)2/Ni@N掺杂还原氧化石墨烯复合电极的制备及电催化析氢性能[J].无机化学学报,2022,38(8):1541-1548. |
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