Nickel nanoparticle-activated MoS₂ for efficient visible light photocatalytic hydrogen evolution

Area of Science:

• Materials Science
• Catalysis
• Renewable Energy

Background:

• Photocatalytic hydrogen evolution from water splitting is crucial for clean energy.
• Current photocatalysts often require complex synthesis and additives.

Purpose of the Study:

• To develop a novel ternary nanocatalyst for efficient photocatalytic hydrogen evolution.
• To achieve stable and high-efficiency hydrogen production from pure and natural water using visible/sun light.

Main Methods:

• Ultrasound-assisted wet synthesis of Ni-Ag-MoS2 ternary nanocatalyst.
• Photocatalytic hydrogen evolution experiments under visible/sun light.
• Experimental characterizations and first-principles calculations to verify performance.

Main Results:

• A high efficiency of 73 μmol g-1 W-1 h-1 was achieved with the (MoS2)84Ag10Ni6 catalyst.
• Stable catalytic activity for long-term hydrogen production from pure and natural water.
• Performance comparable to additive-enriched photocatalysts.

Conclusions:

• The Ni-Ag-MoS2 nanocatalyst enables efficient and stable photocatalytic hydrogen evolution.
• Enhanced activity is due to effective charge migration and MoS2 basal plane activation.
• This offers a promising pathway for clean hydrogen fuel production.