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Recent progress on Janus MoSSe for photocatalytic applications.

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Janus MoSSe shows potential for photocatalytic water splitting but needs enhancement for oxygen evolution. Pairing it with other 2D materials like GaN creates effective heterostructures for efficient water splitting.

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Area of Science:

  • Materials Science
  • Surface Chemistry
  • Catalysis

Background:

  • Janus MoSSe is a 2D material with potential for photocatalytic water splitting due to its dipole moment and charge separation.
  • Pristine MoSSe has limitations for the oxygen evolution reaction (OER), necessitating structural and chemical modifications.

Purpose of the Study:

  • To review recent advancements in engineering Janus MoSSe for improved photocatalytic water splitting.
  • To explore how various modifications influence key physical descriptors for catalytic performance.

Main Methods:

  • Review of defect chemistry, transition-metal functionalization, doping, curvature, and van der Waals heterostructures.
  • Analysis of alterations in dipole moments, band alignment, carrier lifetimes, and water adsorption energies.
  • Theoretical and experimental validation of MoSSe-based heterostructures.

Main Results:

  • Janus MoSSe becomes effective for water splitting when combined with OER-active materials.
  • Heterostructures with 2D materials like WS2, black phosphorus, GaN, and AlN fulfill both redox requirements for water splitting.
  • The MoSSe/GaN system demonstrates enhanced spin splitting and magnetic-field effects on charge dynamics.

Conclusions:

  • Engineering Janus-based heterostructures is crucial for optimizing photocatalytic water splitting under visible light.
  • Combining MoSSe with suitable 2D partners creates efficient photocatalysts by complementing their electronic properties.
  • The study provides a design roadmap for developing advanced Janus-based photocatalytic systems.