Ti₃C₂T_X-based Zr@MXene for CO₂ capture and conversion

Area of Science:

• Materials Science
• Catalysis
• Green Chemistry

Background:

• MXenes, particularly Ti3C2Tx, are emerging materials with tunable properties.
• Carbon dioxide (CO2) utilization is crucial for mitigating climate change and developing sustainable chemical processes.

Purpose of the Study:

• To develop a Zr-doped MXene (Ti3C2Tx) catalyst for enhanced CO2 utilization.
• To investigate the impact of Zr doping on the material's surface area, CO2 uptake, and catalytic activity.

Main Methods:

• Synthesis of Zr-doped Ti3C2Tx MXene.
• Characterization of the material's surface properties and active sites.
• Catalytic testing for CO2 conversion with epoxides.
• Density Functional Theory (DFT) calculations to elucidate reaction mechanisms.

Main Results:

• Zr doping significantly increased the surface area, CO2 uptake, and active site density of Ti3C2Tx.
• The developed catalyst achieved a 99% yield for styrene carbonate production.
• High yields were also observed for the conversion of other epoxides.
• DFT calculations confirmed an accessible and energetically favorable pathway for CO2 utilization.

Conclusions:

• Zr-doped Ti3C2Tx is a highly effective catalyst for CO2 utilization.
• The enhanced properties due to Zr doping facilitate energy-efficient chemical transformations.
• This material presents a promising solution for sustainable CO2 conversion into valuable products.