MOF-based composite catalysts for CO₂ reduction: Recent advances and perspectives.

Area of Science:

• Materials Science
• Catalysis
• Electrochemistry

Background:

• Metal-organic frameworks (MOFs) possess advantageous properties like high surface area and tunable structures for CO2 reduction.
• However, pristine MOFs suffer from poor electrical conductivity, instability, and weak metal-oxygen interactions, limiting their catalytic efficiency.
• Understanding the fundamentals of photo and electro-catalytic CO2 reduction is crucial for developing effective MOF-based systems.

Purpose of the Study:

• To review the potential of MOFs in photo and electro-catalytic CO2 reduction.
• To critically analyze the limitations of pristine MOFs for CO2 reduction applications.
• To discuss recent advancements in MOF-based composite catalysts for enhanced CO2 reduction.

Main Methods:

• Literature review focusing on MOF structures and catalytic CO2 reduction mechanisms.
• Analysis of MOF derivatives and composite materials (e.g., MOF@graphene, MOF@MXene).
• Evaluation of composite properties including conductivity, stability, and catalytic activity.

Main Results:

• MOF-based composites demonstrate improved electrical conductivity, stability, and metal-oxygen interactions compared to pristine MOFs.
• Composite catalysts like MOF@graphene, MOF@metal oxides, MOF@MXene, and MOF@LDH show enhanced catalytic strength for CO2 reduction.
• These composites overcome the inherent limitations of MOFs, paving the way for efficient CO2 conversion.

Conclusions:

• MOF-based composite catalysts offer a promising strategy to overcome the limitations of pristine MOFs for CO2 reduction.
• Rational design of durable and scalable MOF composites is essential for sustainable CO2 utilization.
• Future research should focus on developing advanced MOF composites for efficient and cost-effective CO2 conversion.