| MnCoNi层状双氢氧化物@Co-Ni-S非晶空心多面体复合物的构筑及其优异的电催化析氧性能 |
| Construction of MnCoNi layered double hydroxide@CoNiS amorphous hollow polyhedron composite with excellent electrocatalytic oxygen evolution performance |
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| 摘要: 以泡沫镍(NF)负载的MnCoNi层状双氢氧化物(MnCoNi LDH)纳米针阵列为衬底，通过湿化学两步法成功制备出Co-Ni-S多金属硫化物负载的MnCoNi LDH@Co-Ni-S/NF非晶空心多面体纳米复合材料，该材料具有优异的电催化析氧性能。电化学测试结果显示，在1.0 mol·L-1 KOH溶液中，仅需248 mV的过电位就能输出50 mA·cm-2的电流密度。此外，所构建的MnCoNiLDH@Co-Ni-S/NF非晶空心多面体电极在40、60和80 mA·cm-2下均能连续稳定工作至少20 h，充分表明该电极具备良好的长循环稳定性。 |
| 关键词: 电催化剂 MnCoNi层状双氢氧化物 Co-Ni-S空心多面体 析氧反应 |
| 基金项目: |
| Abstract: The nickel foam (NF)-supported MnCoNi layered double hydroxide (LDH) nano-needle array was used as a substrate. Through a two-step wet-chemical route, a Co-Ni-S polymetallic sulfide-supported MnCoNi LDH@Co-NiS/NF amorphous hollow-polyhedral nanocomposite was successfully synthesized, demonstrating outstanding electrocatalytic oxygen evolution performance. The results of electrochemical tests showed that the material could output a current density of 50 mA·cm-2 with an overpotential of only 248 mV in a 1.0 mol·L-1 KOH solution. In addition, the constructed MnCoNi LDH@Co-Ni-S hollow polyhedral electrode could operate continuously and stably for at least 20 h under different current densities of 40, 60, and 80 mA·cm-2, fully demonstrating that this electrode had good long-term stability. |
| Keywords: electrocatalyst MnCoNi layered double hydroxide Co-Ni-S amorphous hollow polyhedron oxygen evolution reaction |
| 投稿时间：2024-10-21 修订日期：2025-06-03 |
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