Anthropogenic carbon dioxide (CO 2 ) emission is the major contribution to global climate change, presenting an urgent challenge to our society. One of the many important mitigation strategies for reducing greenhouse gas emissions is carbon capture. Conventional carbon capture technology involves wet chemical scrubbing using aqueous amines to absorb CO 2 at industrial sources or directly from the air for further sequestration. This strategy, however, has many limitations including low capacities, poor oxidative stability, degradation in presence of contaminants and large thermal energy demand for absorbent regeneration. In the search for new materials and technologies for carbon capture, electrochemically mediated CO 2 capture has emerged as a promising a) Electronic mail: btb32@cam.ac.uk b) Electronic mail: nah48@cam.ac.uk c) Electronic mail: ajwt3@cam.ac.uk d) Electronic mail: acf50@cam.ac.uk approach. A popular strategy is to use redox-active organic compounds as CO 2 carriers, with quinones being the most representative class of compounds. Electrochemical reduction of quinones generates oxyanion nucleophiles, which have high binding affinities towards CO 2 and have been reported to concentrate and selectively separate CO 2 . The biggest advantage is that quinones can be electrochemically regenerated, leading to energy savings over traditional temperature or pressure swing processes.