A microchanneled solid electrolyte for carbon-efficient CO2 electrolysis

Zero-Gap Electrochemical CO2 Reduction Cells: Challenges and Operational Strategies for Prevention of Salt Precipitation

“…Here CO 2 can be regenerated as carbonate from the cathode and protons from an acidic anolyte recombine. Such an approach, while preventing salt precipitation through the use of an acidic anolyte, causes gas evolution in the middle of the membrane . In principle, a monopolar CEM can also be used to transport H + ions toward the cathode using an acidic anolyte solution devoid of cations.…”

“…Such an approach, while preventing salt precipitation through the use of an acidic anolyte, causes gas evolution in the middle of the membrane. 68 In principle, a monopolar CEM can also be used to transport H + ions toward the cathode using an acidic anolyte solution devoid of cations. The acidity of the cathode needs to be balanced, however, to avoid excessive proton concentrations which would cause HER to dominate CO 2 electrolysis.…”

How membrane characteristics influence the performance of CO2 and CO electrolysis

“…To prevent CO 2 crossover without significantly increasing in cell voltage, Xu et al 242 installed a very thin and highly porous micro-channel solid electrolyte layer between the AEM and the CEM. As a result, the authors successfully reduced the CO 2 crossover and only lost between 3 to 4% CO 2 to the anode while simultaneously regenerating CO 2 internally in the porous solid electrolyte channel (CO 2 recycled back to the cathode inlet stream).…”

Direct carbonate electrolysis into pure syngas

“…44,45 For a substrate binder, we chose a hydrophilic ionomer that is anionpermeable to transport (bi)carbonate ions to the CEM. 46,47 The wettability of the substrate and ionomer is important because hydrophobic elements will hinder ion transport, limiting the availability of carbonate ions in the CO 2 regeneration region. 48 When a hydrophobic substrate or ionomer was incorporated into the CDL, the CO FE was lower than the fully hydrophilic system (Fig.…”