Efficient Visible-Light-Driven Photocatalytic Hydrogen Generation over 2D/2D Co-ZIF-9/Ti₃ C₂ Hybrids

Area of Science:

• Materials Science
• Catalysis
• Renewable Energy

Background:

• Developing efficient, noble-metal-free catalysts for photocatalytic hydrogen (H2) evolution is crucial for sustainable energy.
• Existing catalysts often face challenges related to cost, stability, and efficiency.

Purpose of the Study:

• To fabricate and evaluate a novel 2D/2D Cobalt-Zinc Coordination Polymer-9 (Co-ZIF-9)/Titanium Carbide (Ti3C2) composite as a precious-metal-free photocatalyst.
• To investigate the enhanced photocatalytic H2 evolution performance of the composite compared to bare Co-ZIF-9.

Main Methods:

• A facile electrostatic self-assembly strategy was employed to synthesize the 2D/2D Co-ZIF-9/Ti3C2 composite.
• Photocatalytic H2 evolution rates were measured under specific conditions.
• The stability of the composite catalyst was assessed.

Main Results:

• The Co-ZIF-9/Ti3C2 composite exhibited significantly enhanced photocatalytic H2 evolution compared to bare Co-ZIF-9.
• A maximum H2 generation rate of 3538.5 μmol g⁻¹ h⁻¹ was achieved with 2.5 wt% Ti3C2, which is 9.6 times higher than that of Co-ZIF-9.
• The composite demonstrated excellent photocatalytic stability.

Conclusions:

• The 2D/2D Co-ZIF-9/Ti3C2 composite shows great potential as an efficient and stable noble-metal-free catalyst for photocatalytic H2 generation.
• This work presents a promising strategy for designing advanced catalysts for clean hydrogen production.