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• W4313590804 startingPage "014505" @default.
• W4313590804 abstract "Electrochemical CO 2 reduction is a promising technology to capture and convert CO 2 to valuable chemicals. High Faradaic efficiencies of CO 2 reduction products are achieved with zero-gap alkaline CO 2 electrolyzers with a supporting electrolyte at the anode (anolyte). Herein, we investigate the effect of anolyte on the electrode properties such as catalyst utilization, ionic accessibility etc. of a CO 2 reduction cathode using electrochemical techniques and cell configurations that avoid the complexities related to co-electrolysis. Using 1M KOH as the anolyte and a Cu gas-diffusion-electrode with low Nafion content as the model CO 2 reduction electrode, we find that electrode capacitance (proxy for electrochemically active surface area) and ionic conductivity inside the cathode increase approximately 4 and 447 times, respectively, in presence of KOH. Liquid anolyte wets the electrode’s pore structure more efficiently than capillary condensation of feed water vapor. The ionomer coverage is very low, and its distribution inside the electrode is highly fragmented. Surface ion conduction mechanisms inside the electrode are orders of magnitude lower than the bulk ion conduction in presence of anolyte. This study shows that when an anolyte (e.g., KOH) is used, catalyst utilization and ionic accessibility inside the electrode increase significantly." @default.
• W4313590804 created "2023-01-06" @default.
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• W4313590804 date "2023-01-01" @default.
• W4313590804 modified "2023-09-26" @default.
• W4313590804 title "Anolyte Enhances Catalyst Utilization and Ion Transport Inside a CO₂ Electrolyzer Cathode" @default.
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• W4313590804 doi "https://doi.org/10.1149/1945-7111/acb01d" @default.
• W4313590804 hasPublicationYear "2023" @default.
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