Interface-Engineered C₄N/MgAl-LDH Heterostructure for High-Performance Photocatalytic H₂O₂ Production

Area of Science:

• Materials Science
• Photocatalysis
• Green Chemistry

Background:

• Sustainable hydrogen peroxide (H2O2) production is crucial.
• Current photocatalysts suffer from slow water oxidation kinetics, limiting H2O2 yield.
• Interface engineering is key to overcoming these limitations.

Purpose of the Study:

• To develop an efficient and stable photocatalyst for H2O2 production.
• To investigate the role of interface engineering in enhancing photocatalytic activity.
• To elucidate the reaction pathways for H2O2 formation.

Main Methods:

• In situ electrostatic self-assembly to create C4N/MgAl-LDH heterostructures.
• Photocatalytic H2O2 production experiments using water and air.
• Zeta potential analysis for interface characterization.
• Isotope tracing (H2 18O and 18O2) to identify reaction mechanisms.

Main Results:

• The C4N/MgAl-LDH heterostructure achieved a high H2O2 yield rate of 2.38 mmol g-1 h-1.
• The hybrid material demonstrated excellent stability over 20 cycles.
• Performance significantly outperformed bare components and physical mixtures.
• Evidence of dual H2O2 formation pathways involving water and oxygen was confirmed.

Conclusions:

• Interface engineering via C4N/MgAl-LDH heterostructure formation boosts photocatalytic H2O2 production.
• The method offers a simple, cost-effective, and scalable route for advanced photocatalyst design.
• This work provides a promising strategy for sustainable H2O2 synthesis.