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Investigation of Early Plasma Evolution Induced by Ultrashort Laser Pulses
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Nitrogen plasma engineered MoS2 for catalyzing hydrogen evolution reaction.

Haoyang He1,2, Ai Wang1,3, Fengrui Yang2

  • 1Key Laboratory of Micro-Nano Optoelectronic Materials and Devices at Sichuan Normal University of Sichuan Province, Chengdu 610101, China.

Iscience
|February 9, 2026
PubMed
Summary
This summary is machine-generated.

Nitrogen plasma treatment activates basal planes of monolayer molybdenum disulfide (ML-MoS2) for enhanced hydrogen evolution reaction (HER) catalysis. This scalable method improves the performance of 2D materials for electrocatalysis.

Keywords:
Applied sciencesElectrochemistry

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Catalysis

Background:

  • Monolayer molybdenum disulfide (ML-MoS2) shows promise for electrocatalysis due to its electrical properties and surface area.
  • However, inert basal planes and limited active edge sites hinder its catalytic efficiency.

Purpose of the Study:

  • To activate the basal plane of ML-MoS2 for improved hydrogen evolution reaction (HER) catalysis.
  • To develop a scalable method for enhancing the performance of 2D transition-metal dichalcogenides.

Main Methods:

  • Remote nitrogen (N)-plasma treatment to incorporate N into ML-MoS2.
  • Experimental and theoretical analyses to understand the mechanism of HER enhancement.

Main Results:

  • Optimized N-doped ML-MoS2 achieved an overpotential of 348 mV at 10 mA cm-2 and a Tafel slope of 94 mV·dec-1.
  • Nitrogen incorporation induced lattice defects, altered charge distribution, and increased active-site density.
  • Demonstrated enhanced HER activity attributed to surface activation.

Conclusions:

  • Remote N-plasma treatment is an effective strategy for activating the basal plane of ML-MoS2.
  • This approach offers a scalable route for tuning the catalytic performance of 2D materials for HER.
  • The findings pave the way for advanced electrocatalyst design.