Janus WSSe Monolayer: An Excellent Photocatalyst for Overall Water Splitting

Area of Science:

• Materials Science
• Photocatalysis
• Renewable Energy

Background:

• Efficient photocatalysts are crucial for water splitting to produce clean hydrogen fuel.
• Developing stable materials with strong optical absorption and low reaction barriers remains a challenge.

Purpose of the Study:

• To investigate the photocatalytic potential of two-dimensional Janus WSSe for water splitting.
• To explore the effects of strain deformation on the material's properties.

Main Methods:

• Density functional theory (DFT) simulations were employed.
• Analysis of optical absorbance, band edge potentials, and carrier dynamics was performed.

Main Results:

• Janus WSSe exhibits strong visible light absorption and suitable band edge potentials.
• The material demonstrates high carrier separation and transfer efficiency, crucial for photocatalysis.
• Adequate driving forces for water redox reactions and resistance to photoinduced corrosion were observed.
• Tensile strain was found to improve energy conversion efficiency and reduce exciton binding energy.

Conclusions:

• Janus WSSe is a promising candidate for visible-light-driven water splitting.
• Strain engineering offers an effective strategy to enhance photocatalytic performance and broaden light absorption.