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<p>The activity and stability of single-atom catalysts (SACs) are intimately associated with the structure of supports. Herein, by employing a van der Waals (vdW) heterostructure support, we construct a highly active and durable Pt SAC for hydrogen evolution reaction (HER). The unique support consists of monolayer MoS<sub>2</sub> attaching on hierarchical N-doped carbon nanocages (hNCNC), on which Pt presents as individual single atoms on the hNCNC and as island-like single-atom layers on the MoS<sub>2</sub>. The optimized Pt<sub>1</sub>-MoS<sub>2</sub>/hNCNC demonstrates low overpotential (11 mV at 10 mA cm<sup>−2</sup>) and high mass activity (5.6 A mg<sub>Pt</sub><sup>−1</sup> at −20 mV) in 0.5 M H<sub>2</sub>SO<sub>4</sub> solution, outperforming commercial Pt/C. Impressively, the Pt<sub>1</sub>-MoS<sub>2</sub>/hNCNC exhibits improved long-term stability in proton exchange membrane water electrolyzer relative to commercial Pt/C. The excellent HER performance is attributed to the regulated electronic structure, robust interaction of Pt atoms with MoS<sub>2</sub>/hNCNC and facilitated charge transfer. This study establishes an innovative strategy to develop a highly active and durable Pt SAC using vdW heterostructure supports.</p>

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Platinum single-atom catalysts anchored on van der Waals heterostructure support for durable hydrogen evolution

  • 期刊论文

  • 发表日期：

    2025年10月11日

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  • Haohua He,
  • Jingyi Tian,
  • Xue Bai,
  • Chenghui Mao,
  • Yan Zhang,
  • Changkai Zhou,
  • Xiang Peng,
  • Lijun Yang,
  • Xizhang Wang,
  • Qiang Wu,
  • Zheng Hu

摘要

The activity and stability of single-atom catalysts (SACs) are intimately associated with the structure of supports. Herein, by employing a van der Waals (vdW) heterostructure support, we construct a highly active and durable Pt SAC for hydrogen evolution reaction (HER). The unique support consists of monolayer MoS2 attaching on hierarchical N-doped carbon nanocages (hNCNC), on which Pt presents as individual single atoms on the hNCNC and as island-like single-atom layers on the MoS2. The optimized Pt1-MoS2/hNCNC demonstrates low overpotential (11 mV at 10 mA cm−2) and high mass activity (5.6 A mgPt−1 at −20 mV) in 0.5 M H2SO4 solution, outperforming commercial Pt/C. Impressively, the Pt1-MoS2/hNCNC exhibits improved long-term stability in proton exchange membrane water electrolyzer relative to commercial Pt/C. The excellent HER performance is attributed to the regulated electronic structure, robust interaction of Pt atoms with MoS2/hNCNC and facilitated charge transfer. This study establishes an innovative strategy to develop a highly active and durable Pt SAC using vdW heterostructure supports.