Single-Atom Pt as Co-Catalyst for Enhanced Photocatalytic H2 Evolution

Area of Science:

• Materials Science
• Catalysis
• Nanotechnology

Background:

• Graphitic carbon nitride (g-C3N4) is a promising semiconductor photocatalyst.
• Enhancing the efficiency of photocatalytic hydrogen evolution is crucial for sustainable energy.
• Co-catalysts are essential for improving the performance of photocatalytic systems.

Purpose of the Study:

• To develop a novel single-atom platinum (Pt) co-catalyst embedded in 2D g-C3N4.
• To investigate the effect of single-atom Pt on the photocatalytic H2 evolution activity of g-C3N4.
• To compare the performance of the single-atom Pt co-catalyst with Pt nanoparticles and bare g-C3N4.

Main Methods:

• Synthesis of isolated single-atom platinum embedded in the sub-nanoporosity of 2D g-C3N4.
• Characterization of the co-catalyst's structure and properties.
• Evaluation of photocatalytic H2 evolution activity under simulated solar light.

Main Results:

• The single-atom Pt co-catalyst demonstrated high stability and atom efficiency.
• Embedding single-atom Pt altered the surface trap states of g-C3N4.
• Photocatalytic H2 evolution activity was 8.6 times higher than Pt nanoparticles and 50 times higher than bare g-C3N4.

Conclusions:

• Isolated single-atom Pt embedded in 2D g-C3N4 is a highly effective co-catalyst for photocatalytic H2 evolution.
• This approach maximizes atom efficiency and enhances charge carrier dynamics.
• The findings offer a new pathway for designing advanced co-catalysts for efficient solar fuel production.