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<p>Developing highly efficient and cost-effective electrocatalysts for hydrogen evolution reaction (HER) is grandly challenging in alkaline and alkaline seawater electrolytes. Herein, the asymmetric interfacial active sites with Ru nanoparticles and Ni single atoms in Ru/Ni-N-C were designed through a solvothermal-pyrolysis process. Constructing highly asymmetric interfacial active sites with a strong electron delocalization effect significantly improves HER kinetics. As expected, Ru/Ni-N-C requires low overpotentials with around 20 mV at 10 mA cm<sup>−2</sup> and robust durability over 48 h in alkaline and alkaline seawater electrolytes. Even at 200 mA cm<sup>−2</sup>, the overpotentials are close to 100 mV in both above electrolytes for Ru/Ni-N-C. Density function theory calculation results suggest that the asymmetric interface between Ru nanoparticle and Ni-N-C could accelerate the dissociation of water molecules and modulate the hydrogen species, consequently improving the HER performances. This work opens a unique approach for constructing advanced materials for energy conversion.</p>

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Asymmetric interfacial engineering regulated charge distribution on Ru/Ni-N-C sites for efficient hydrogen evolution reaction in alkaline and seawater electrolytes

  • 期刊论文

  • 发表日期：

    2025年1月3日

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  • Rui Yu,
  • Xi Cao,
  • Chengyang Zhu,
  • Qingqing Chen,
  • Ziyi Yan,
  • Binbin Jiang,
  • Junjie Mao,
  • Xianwen Wei

摘要

Developing highly efficient and cost-effective electrocatalysts for hydrogen evolution reaction (HER) is grandly challenging in alkaline and alkaline seawater electrolytes. Herein, the asymmetric interfacial active sites with Ru nanoparticles and Ni single atoms in Ru/Ni-N-C were designed through a solvothermal-pyrolysis process. Constructing highly asymmetric interfacial active sites with a strong electron delocalization effect significantly improves HER kinetics. As expected, Ru/Ni-N-C requires low overpotentials with around 20 mV at 10 mA cm−2 and robust durability over 48 h in alkaline and alkaline seawater electrolytes. Even at 200 mA cm−2, the overpotentials are close to 100 mV in both above electrolytes for Ru/Ni-N-C. Density function theory calculation results suggest that the asymmetric interface between Ru nanoparticle and Ni-N-C could accelerate the dissociation of water molecules and modulate the hydrogen species, consequently improving the HER performances. This work opens a unique approach for constructing advanced materials for energy conversion.