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<p>The highly efficient Ni-TiO<sub>2</sub> nanowire (NTw) composite electrode was synthesized by a simple, fast and low cost composite electrodeposition technique for hydrogen evolution reaction (HER). The unique flocculent structure of Tw increased the specific surface area of the composite electrode and accelerated the rate of material exchange and charge transfer during the HER. When Tw concentration was 7&#xa0;g L<sup>−1</sup>, the minimum hydrogen evolution overpotential of the NTw-7 composite electrode was only 167&#xa0;mV at the current density of 10&#xa0;mA&#xa0;cm<sup>−1</sup>, demonstrating the best hydrogen evolution performance. Apart from its good catalytic activity, NTw-7 also exhibited better hydrogen evolution stability. HER durability tests carried out for 50&#xa0;h did not change significantly (only 4&#xa0;mV). Furthermore, the OH<sub>ads</sub> species on the surface of TiO<sub>2</sub> were helpful for the formation of absorbed H<sub>ads</sub> species, which is the rate-determining step for HER. This study presents a new strategy for modified Ni-based metallic oxide composite material.</p>

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TiO2 nanowire-composited nickel-based electrocatalyst towards enhanced hydrogen evolution reaction in alkaline solution

  • 期刊论文

  • 发表日期：

    2025年2月19日

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  • Lehong Xing,
  • Yutong Zhao,
  • Jiayi Liu,
  • Yue Zuo,
  • Xinting Shi

摘要

The highly efficient Ni-TiO2 nanowire (NTw) composite electrode was synthesized by a simple, fast and low cost composite electrodeposition technique for hydrogen evolution reaction (HER). The unique flocculent structure of Tw increased the specific surface area of the composite electrode and accelerated the rate of material exchange and charge transfer during the HER. When Tw concentration was 7 g L−1, the minimum hydrogen evolution overpotential of the NTw-7 composite electrode was only 167 mV at the current density of 10 mA cm−1, demonstrating the best hydrogen evolution performance. Apart from its good catalytic activity, NTw-7 also exhibited better hydrogen evolution stability. HER durability tests carried out for 50 h did not change significantly (only 4 mV). Furthermore, the OHads species on the surface of TiO2 were helpful for the formation of absorbed Hads species, which is the rate-determining step for HER. This study presents a new strategy for modified Ni-based metallic oxide composite material.