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<p>Supported nanocatalysts are crucial for hydrogen production, yet their activity and stability are challenging to manage due to complex metal-support interfaces. Herein, we design Pt@ anatase&amp;rutile-TiO<sub>2</sub> with a strong-weak dual interface by modifying TiO<sub>2</sub> using high-energy ball milling and in-situ reduction to vary surface energies. Experiments and density functional theory calculations reveal that the strong Pt-anatase TiO<sub>2</sub> interface enhances hydrogen adsorption. In contrast, the weak Pt-rutile TiO<sub>2</sub> interface facilitates hydrogen desorption, simultaneously preventing Pt agglomeration and increasing reaction rate. As a result, the tailored catalyst has a 529.3 mV overpotential at 1000 mA cm<sup>−2</sup> in 0.5 M H<sub>2</sub>SO<sub>4</sub>, 0.69 times less than commercial Pt/C. It also possesses 8.8 times the mass activity of commercial Pt/C and maintains a low overpotential after 2000 cyclic voltammetry cycles, suggesting high activity and stability. This strong-weak dual interface engineering strategy shows potential for overall water splitting and proton exchange membrane water electrolyzer, advancing the design of efficient supported nanocatalysts.</p>

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Strong-weak dual interface engineered electrocatalyst for large current density hydrogen evolution reaction

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年1月18日

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  • Shaorou Ke,
  • Ruiyu Mi,
  • Xin Min,
  • Xinyu Zhu,
  • Congyi Wu,
  • Xin Li,
  • Bozhi Yang,
  • Xiaowen Wu,
  • Yangai Liu,
  • Zhaohui Huang,
  • Minghao Fang

摘要

Supported nanocatalysts are crucial for hydrogen production, yet their activity and stability are challenging to manage due to complex metal-support interfaces. Herein, we design Pt@ anatase&rutile-TiO2 with a strong-weak dual interface by modifying TiO2 using high-energy ball milling and in-situ reduction to vary surface energies. Experiments and density functional theory calculations reveal that the strong Pt-anatase TiO2 interface enhances hydrogen adsorption. In contrast, the weak Pt-rutile TiO2 interface facilitates hydrogen desorption, simultaneously preventing Pt agglomeration and increasing reaction rate. As a result, the tailored catalyst has a 529.3 mV overpotential at 1000 mA cm−2 in 0.5 M H2SO4, 0.69 times less than commercial Pt/C. It also possesses 8.8 times the mass activity of commercial Pt/C and maintains a low overpotential after 2000 cyclic voltammetry cycles, suggesting high activity and stability. This strong-weak dual interface engineering strategy shows potential for overall water splitting and proton exchange membrane water electrolyzer, advancing the design of efficient supported nanocatalysts.