To isolate the Faradaic and double-layer capacity contributions to CO2 capture, three different voltage windows were explored. A voltage window of 0 to -1 V was first used to avoid anthraquinone redox-activity on f-CMK-3, which meant any pressure variation seen would be due to anthraquinone redox (Figure ). The measurements in this voltage range show negligible pressure variations, similar to what is seen for u-CMK-3 in the same voltage range (Figure .2). Experiments under an N2 environment also showed minimal pressure variation