Georgia Tech Research Corporation is investigating the use of hybrid sorbents based on metal-organic framework (MOF, MIL-101(Cr)) materials functionalized with amine groups for the direct air capture (DAC) of carbon dioxide (CO2) at sub-ambient conditions. The primary goal of the project is to tailor MIL-101(Cr)-based sorbents to overcome technical barriers associated with their application at sub-ambient temperatures/conditions and validate their amenability to practical DAC application. In this direction, the stability of the powder sorbents against adsorption-desorption cycles and oxidative degradation is being determined.