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<p>Insight into the growth behavior and electronic regulation of platinum (Pt) on various transition metal supports is paramount in developing high-performing electrocatalysts for hydrogen evolution reactions (HER). Herein, we studied the influence of molybdenum-based supports (MoX, X = C, N, P, and S) on the growth behavior and electronic regulation of Pt. We found that the formation energy variations between Pt single atom and clusters on MoX supports play a pivotal role in the growth behavior of Pt. Moreover, the electronic regulation of Pt induced by metal-support interaction may reflect the valence changes of Pt in Pt-MoX/C. The Pt-MoC/C catalyst with a moderate valence state of Pt exhibits the best HER activity with an overpotential of 12.0 mV at 10 mA cm<sup>−2</sup> and a mass activity of 27.1 A mg<sub>Pt</sub><sup>−1</sup>, 12.3 times as high as that of commercial 20 wt% Pt/C. This work provides constructive guidance for the design of high-performance HER catalysts.</p>

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Growth behavior and electronic regulation of Pt on various Mo-based supports for hydrogen evolution electrocatalysis

  • 期刊论文

  • 发表日期：

    2025年1月2日

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  • Lulu Chen,
  • Yichao Huang,
  • Jiajun Wang,
  • Meihong Liao,
  • Zhiyuan Liu,
  • Meiqi Liu,
  • Hanqing Cai,
  • Lin Wang,
  • Lidong Gao,
  • Dawei Hu,
  • Lianming Zhao,
  • Ning Pu,
  • Zhuangjun Fan

摘要

Insight into the growth behavior and electronic regulation of platinum (Pt) on various transition metal supports is paramount in developing high-performing electrocatalysts for hydrogen evolution reactions (HER). Herein, we studied the influence of molybdenum-based supports (MoX, X = C, N, P, and S) on the growth behavior and electronic regulation of Pt. We found that the formation energy variations between Pt single atom and clusters on MoX supports play a pivotal role in the growth behavior of Pt. Moreover, the electronic regulation of Pt induced by metal-support interaction may reflect the valence changes of Pt in Pt-MoX/C. The Pt-MoC/C catalyst with a moderate valence state of Pt exhibits the best HER activity with an overpotential of 12.0 mV at 10 mA cm−2 and a mass activity of 27.1 A mgPt−1, 12.3 times as high as that of commercial 20 wt% Pt/C. This work provides constructive guidance for the design of high-performance HER catalysts.