| abstract |
The invention provides an electrochemical CO 2 capture device and methods employing proton- coupled redox active species, e.g., a quinone, phenazine, alloxazine, isoalloxazine, or polyoxometalate, whose protonation and deprotonation can be controlled electrochemically to modify the pH of an aqueous solution or aqueous suspension. This change in pH can be used to sequester and release CO 2 . The CO 2 capture device can be used to sequester gaseous CO 2 from a point source, such as flue gas, or from ambient air. |