A [Zn₃]-cluster-based MOF catalyst for highly efficient and recyclable CO₂ conversion into cyclic carbonates

Area of Science:

• Materials Science
• Catalysis
• Green Chemistry

Background:

• Carbon dioxide (CO2) conversion into value-added cyclic carbonates is crucial for sustainable carbon utilization.
• Existing methods often lack efficiency or stability for industrial applications.

Purpose of the Study:

• To develop a novel, robust metal-organic framework (MOF) for efficient CO2 conversion.
• To investigate the catalytic performance of the MOF in the synthesis of cyclic carbonates.

Main Methods:

• A two-step synthetic strategy was employed to create a [Zn3]-cluster-based framework (Zn-BTB).
• Characterization included BET surface area analysis and CO2 adsorption measurements.
• Catalytic activity was tested for CO2 cycloaddition with epoxides.

Main Results:

• Zn-BTB exhibited a high BET surface area (523.86 m2 g-1) and significant CO2 adsorption capacity.
• The framework demonstrated excellent stability across various conditions (solvents, pH 1-13, up to 422 °C).
• High yields (>80%) of cyclic carbonates were achieved, with consistent performance over eight catalytic cycles.

Conclusions:

• The developed Zn-BTB MOF is a stable and effective catalyst for CO2 conversion into cyclic carbonates.
• The two-step strategy provides a viable route for designing robust MOFs with hierarchical porosity for sustainable applications.
• This work highlights the potential of MOFs in addressing carbon capture and utilization challenges.