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• W4328052009 abstract "Abstract The requirement of concentrated carbon dioxide (CO 2 ) feedstock significantly limits the economic feasibility of electrochemical CO 2 reduction (eCO 2 R) which often involves multiple intermediate processes, including CO 2 capture, energy‐intensive regeneration, compression, and transportation. Herein, a bifunctional gas diffusion electrode (BGDE) for separation and eCO 2 R from a low‐concentration CO 2 stream is reported. The BGDE is demonstrated for the selective production of ethylene (C 2 H 4 ) by combining high‐density‐polyethylene‐derived porous carbon (HPC) as a physisorbent with polycrystalline copper as a conversion catalyst. The BGDE shows substantial tolerance to 10 vol% CO 2 exhibiting a Faradaic efficiency of ≈45% toward C 2 H 4 at a current density of 80 mA cm −2 , outperforming previous reports that utilized such partial pressure ( P CO2 = 0.1 atm and above) and unaltered polycrystalline copper. Molecular dynamics simulation and mixed gas permeability assessment reveal that such selective performance is ensured by high CO 2 uptake of the microporous HPC as well as continuous desorption owing to the molecular diffusion and concentration gradient created by the binary flow of CO 2 and nitrogen (CO 2 |N 2 ) within the sorbent boundary. Based on detailed techno‐economic analysis, it is concluded that this in situ process can be economically compelling by precluding the C 2 H 4 production cost associated with the energy‐intensive intermediate steps of the conventional decoupled process." @default.
• W4328052009 created "2023-03-22" @default.
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• W4328052009 date "2023-04-29" @default.
• W4328052009 modified "2023-10-17" @default.
• W4328052009 title "Bifunctional Gas Diffusion Electrode Enables In Situ Separation and Conversion of CO₂ to Ethylene from Dilute Stream" @default.
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• W4328052009 doi "https://doi.org/10.1002/adma.202300389" @default.
• W4328052009 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/36943940" @default.

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