Mechanochemical Impregnation of a Redox-Active Guest into a Metal-Organic Framework for Electrochemical Capture of CO2

This paper describes the facilesynthesis of a redox-activeMOF/quinone composite, which can be utilized as a cathodic materialfor the electrochemical capture of CO2. Conventionaladsorbents for CO2 capture typicallyutilizeswings in temperature and/or pressure to adsorb and desorb CO2. These mechanisms can be energy-intensive, which has inspiredfurther research on alternative capture mechanisms such as electro-swingCO(2) capture. For this, metal-organic frameworks(MOFs) have been suggested as a potential adsorbent owing to theirstability, ultrahigh surface areas, and ability to facilitate redoxreactions. However, MOFs have not yet been utilized for the electrochemicalcapture of CO2. In this work, we demonstrate the facilesynthesis of a redox-active MOF-based adsorbent for the electrochemicalcapture of CO2, and we employ spectroelectrochemistry tounderstand the adsorbent's interaction with CO2.This represents an advancement toward the scalable production of electro-swingadsorbents and signals that MOFs can be successfully employed forthis process.