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Related Experiment Video

Updated: Apr 7, 2026

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Monolayer MoSe2/MoS2 Periodic Lateral Heterostructures with Built-In Electric Field Modulation for Hydrogen

Wenxiu Yan1, Huicong Li1, Zeqin Xin2

  • 1Beijing Key Laboratory for Magneto-Photoelectrical Composite and Interface Science, State Key Laboratory for Advanced Metals and Materials, School of Mathematics and Physics, University of Science and Technology Beijing, Beijing 100083, China.

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|April 6, 2026
PubMed
Summary

Researchers developed new 2D heterostructure catalysts using molybdenum diselenide and disulfide. These advanced materials offer efficient, low-cost hydrogen production by optimizing hydrogen adsorption for the hydrogen evolution reaction.

Keywords:
HERinterfacial potential gradientlaser direct writingnonprecious metal catalystsperiodic lateral heterostructures

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Area of Science:

  • Materials Science
  • Electrochemistry
  • Catalysis

Background:

  • Developing efficient, low-cost nonprecious metal catalysts is vital for sustainable hydrogen production.
  • Two-dimensional transition metal dichalcogenides show promise for hydrogen evolution reaction (HER) catalysis but suffer from low activity and weak hydrogen adsorption.

Purpose of the Study:

  • To fabricate MoSe2/MoS2 periodic lateral heterostructures for enhanced HER catalysis.
  • To investigate the role of interfacial potential modulation and electronic band engineering in improving catalyst performance.

Main Methods:

  • Fabrication of MoSe2/MoS2 heterostructures using laser direct writing and selective selenization.
  • Characterization using Kelvin probe force microscopy to analyze interfacial potential.
  • Density functional theory (DFT) calculations to understand electronic structure and reaction mechanisms.

Main Results:

  • An interfacial transition region with a built-in electric field was observed.
  • DFT calculations revealed upward shift of the d-band center and increased density of states near the Fermi level.
  • The heterostructures achieved an overpotential of 45 mV at 10 mA cm⁻² and a Tafel slope of 37.9 mV dec⁻¹, indicating excellent HER activity.

Conclusions:

  • Interfacial potential modulation and band engineering effectively enhance the catalytic activity of 2D heterostructures.
  • The developed MoSe2/MoS2 heterostructures show significant promise as cost-effective alternatives to precious-metal catalysts for hydrogen production.