Efficient CO₂ Capture and Activation on Novel Two-Dimensional Transition Metal Borides

Area of Science:

• Materials Science
• Environmental Chemistry
• Computational Chemistry

Background:

• Atmospheric carbon dioxide (CO2) drives global warming, greenhouse effects, and ocean acidification.
• Mitigating CO2 requires efficient conversion, capture, or storage strategies.
• Two-dimensional (2D) materials offer unique properties for environmental applications.

Purpose of the Study:

• To introduce a novel family of 2D transition metal borides (MBenes).
• To investigate the stability and electronic properties of MBenes.
• To evaluate MBenes' potential for CO2 capture and activation.

Main Methods:

• Density Functional Theory (DFT) calculations.
• Analysis of static and dynamic stability.
• Calculation of CO2 adsorption energies and charge transfer.

Main Results:

• A new family of 2D MBenes (M = Sc, Ti, V, Cr, Mn, Fe) was identified and confirmed to be stable.
• MBenes exhibit metallic nature and high electrical conductivity.
• CO2 adsorption energies ranged from -1.04 to -3.95 eV, indicating strong binding.
• Evidence of CO2 activation via charge transfer (CO2δ-) was observed.

Conclusions:

• MBenes are stable 2D materials with excellent conductivity.
• MBenes demonstrate significant potential for CO2 capture and activation.
• These materials could serve as cost-effective catalysts for CO2 mitigation.