Electrochemically driven carboxylation of reduced quinones has been well documented. While neutral anthraquinone does not show carbon dioxide binding, electrochemical reduction to form a radical anion (1 electron reduction) or dianion (2 electron reduction) activates this molecule to bind CO2 in either an EECC or ECEC (E = electron transfer, C = chemical reaction) mechanism (Scheme 1). While most early studies used analytical electrochemistry techniques to study the carbon dioxide capture of quinones and other redox-active molecules, more recent work has begun to develop practical devices that can capture carbon dioxide in an electrochemically driven process. One approach for making devices is to use quinones dissolved in solution in a flow batterylike system, though these systems suffer from low quinone solubility as well as the crossover of redox-active molecules through the separator membrane, causing capacity fade.