Lee, Woong Hee Lim, Chulwan Lee, Si Young Chae, Keun Hwa Choi, Chang Hyuck Lee, Ung Min, Byoung Koun Hwang, Yun Jeong Oh, Hyung-Suk 2024-01-19T14:32:59Z 2024-01-19T14:32:59Z 2021-09-04 2021-06 2211-2855 https://pubs.kist.re.kr/handle/201004/116948 The electrochemical reduction of CO2 to ethylene has the potential to reduce greenhouse gas emissions while producing commodity chemicals for plastics; however, a scalable and feasible system for this remains a challenge. Herein, we report an efficient and stackable electrode design for the electrolysis of CO2 to ethylene. Using KOH-incorporated Cu nanoparticle (Cu-KOH) as the cathode in a zero-gap electrolyzer, Faradaic efficiency of 78.7% for C-2 products was achieved at a current density of 281 mA cm(-2). Among C-2 products, ethylene with a 54.5% FE was dominant product. For mass production, three membrane electrode assemblies (MEAs) were stacked and operated. Operando X-ray absorption spectroscopy under the zero-gap electrolyzer suggested mainly metallic Cu state with some persistent oxide-derived Cu species in Cu-KOH, including Cu2O and Cu(OH)(2), which expected a synergistic effect for the conversion of CO2 to C2H4. Our findings provide a new strategy for converting CO2 to C2H4, which is expected to accelerate the commercialization of high-value chemical production through electrochemical CO2 reduction. English Elsevier BV Highly selective and stackable electrode design for gaseous CO2 electroreduction to ethylene in a zero-gap configuration Article 10.1016/j.nanoen.2021.105859 1 Nano Energy, v.84 Nano Energy 84 N scie scopus 000649697700002 2-s2.0-85100900686 Chemistry, Physical Nanoscience & Nanotechnology Materials Science, Multidisciplinary Physics, Applied Chemistry Science & Technology - Other Topics Materials Science Physics Article CARBON-DIOXIDE REDUCTION FUEL-CELL STACK ELECTROCHEMICAL REDUCTION COPPER ELECTRODES EFFICIENT ELECTROCATALYSTS CONVERSION CATALYSTS INSIGHTS STATE Zero-gap electrolyzer CO2 reduction reaction (CO2RR) Ethylene KOH incorporated Cu Scaling and stacking up system