Highly Selective Electrochemical Bicarbonate Conversion across C 1 and C 2 Products by Interface-Modulation with a Stripping Compartment

High Resolution Image Download MS PowerPoint Slide Electrochemical reactive carbon capture (eRCC) is a promising route for carbon utilization, but its performance is limited by fundamental constraints in conventional membrane electrode assembly (MEA) configurations. The key steps of eRCC, such as CO 2 desorption, mass transport, and conversion, are detrimentally coupled at the zero-gap MEA interface. Here, we demonstrate that incorporating a dedicated stripping compartment enables the direct supply of CO 2 -laden solution to the membrane interface without electrode obstruction, and effectively decouples the mass transport of desorbed CO 2 from its conversion in an interface-modulated three-compartment flow cell (3CFC), by modulating the pressure differential across compartments to drive directed CO 2 transport. The in situ/operando Raman spectroscopy revealed its unique pH-buffering capa…