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Abstract <p>The Ni/CNTs-SnO<sub>2</sub> composite electrodes were prepared by the composite electrodeposition method. The influence of the incorporation of CNTs-SnO<sub>2</sub> on the hydrogen evolution reaction (HER) of Ni coating was investigated. The Ni/CNTs-SnO<sub>2</sub> composite electrodes were demonstrated successfully by SEM, XRD and EDX. The physical characterization indicated that the average sizes of the CNTs-SnO<sub>2</sub> particles were about 120 nm. The incorporation of CNTs-SnO<sub>2</sub> had been altered the preferred orientation of Ni coatings and the microscopic morphology of composite coatings. The Ni/CNTs-SnO<sub>2</sub> composite electrodes were tested by LSV, Tafel, EIS and CP to define their catalytic activity and stability for the HER. Compared with the Ni coating, the Ni/CNTs-SnO<sub>2</sub> composite electrodes had a larger specific surface area, which could provide more catalytic active sites for the HER. The overpotential of the HER was reduced. The electrocatalytic hydrogen evolution performance of the composite electrodes were improved. At a cathodic current density of 10 mA/cm<sup>2</sup>, the Ni/CNTs-SnO<sub>2</sub> composite electrodes prepared with 0.75 g/L of CNTs-SnO<sub>2</sub> displayed a lowest overpotential (259 mV) for HER, which demonstrated the highest catalytic activity for HER.</p>

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Microstructure and Hydrogen Evolution Catalytic Properties of Ni/CNTs-SnO2 Prepared by Electrodeposition Method

  • 期刊论文

  • 发表日期：

    2025年2月1日

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  • Lehong Xing,
  • Yungui Hao,
  • Yixin Wang,
  • Yutong Zhao,
  • Yue Zuo,
  • Chenyang Sun

摘要

Abstract

The Ni/CNTs-SnO2 composite electrodes were prepared by the composite electrodeposition method. The influence of the incorporation of CNTs-SnO2 on the hydrogen evolution reaction (HER) of Ni coating was investigated. The Ni/CNTs-SnO2 composite electrodes were demonstrated successfully by SEM, XRD and EDX. The physical characterization indicated that the average sizes of the CNTs-SnO2 particles were about 120 nm. The incorporation of CNTs-SnO2 had been altered the preferred orientation of Ni coatings and the microscopic morphology of composite coatings. The Ni/CNTs-SnO2 composite electrodes were tested by LSV, Tafel, EIS and CP to define their catalytic activity and stability for the HER. Compared with the Ni coating, the Ni/CNTs-SnO2 composite electrodes had a larger specific surface area, which could provide more catalytic active sites for the HER. The overpotential of the HER was reduced. The electrocatalytic hydrogen evolution performance of the composite electrodes were improved. At a cathodic current density of 10 mA/cm2, the Ni/CNTs-SnO2 composite electrodes prepared with 0.75 g/L of CNTs-SnO2 displayed a lowest overpotential (259 mV) for HER, which demonstrated the highest catalytic activity for HER.