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Compared to CO\n                    <jats:sub>2<\/jats:sub>\n                    conversion in gas\u2010fed systems, this system typically suffers from low Faradaic efficiency (FE), especially for multicarbon (C\n                    <jats:sub>2+<\/jats:sub>\n                    ) products. Here, we report an engineered material structuring to selectively produce C\n                    <jats:sub>2+<\/jats:sub>\n                    products directly from a N\n                    <jats:sub>2<\/jats:sub>\n                    \u2010saturated bicarbonate solution. Multiphysics modeling studies reveal the critical role of local current density distribution and the spatio\u2010selective evolution of C\n                    <jats:sub>2+<\/jats:sub>\n                    products, which is favored in thinner catalysts (240\u00a0\u00b5m thickness). By jointly tailoring catalyst configuration and mass transport in bicarbonate electroreduction, adjusting the thickness, porosity, and surface oxidation of copper (Cu) mesh catalysts, as well as catholyte composition, we achieved a maximum C\n                    <jats:sub>2<\/jats:sub>\n                    H\n                    <jats:sub>4<\/jats:sub>\n                    FE of 39% and total C\n                    <jats:sub>2+<\/jats:sub>\n                    FE over 55% at 150\u00a0mA cm\n                    <jats:sup>\u22122<\/jats:sup>\n                    with a 240\u00a0\u00b5m thick Cu mesh. The system is also stable for over 160\u00a0h at 100\u00a0mA cm\n                    <jats:sup>\u22122<\/jats:sup>\n                    with maintained C\n                    <jats:sub>2<\/jats:sub>\n                    H\n                    <jats:sub>4<\/jats:sub>\n                    FE over 20%. Our electrolysis system converts bicarbonate to C\n                    <jats:sub>2+<\/jats:sub>\n                    with over 90% CO\n                    <jats:sub>2<\/jats:sub>\n                    utilization efficiency, reducing regeneration and separation costs. Optimizing catalyst pore structure, and copper surface oxide is a key to maximizing C\n                    <jats:sub>2<\/jats:sub>\n                    H\n                    <jats:sub>4<\/jats:sub>\n                    production from bicarbonate solutions.\n                  <\/jats:p>","DOI":"10.1002\/anie.202509975","type":"journal-article","created":{"date-parts":[[2025,7,1]],"date-time":"2025-07-01T12:03:47Z","timestamp":1751371427000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["Selective Electrochemical Production of Ethylene from Bicarbonate Solution"],"prefix":"10.1002","volume":"64","author":[{"given":"Behnam Nourmohammadi","family":"Khiarak","sequence":"first","affiliation":[{"name":"Department of Chemical Engineering Queen's University  Kingston ON K7L 3N6 Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Gelson T. S. T.","family":"da Silva","sequence":"additional","affiliation":[{"name":"Department of Chemical Engineering Queen's University  Kingston ON K7L 3N6 Canada"},{"name":"Interdisciplinary Laboratory of Electrochemistry and Ceramics Department of Chemistry Federal University of Sao Carlos  S\u00e3o Carlos SP 13565\u2013905 Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jackson","family":"Crane","sequence":"additional","affiliation":[{"name":"Department of Mechanical and Materials Engineering Queen's University  Kingston Ontario K7P 3N6 Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Colin P.","family":"O'Brien","sequence":"additional","affiliation":[{"name":"CERT Systems Inc.  Toronto Ontario M6N 2J1 Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Michael R.","family":"Pepe","sequence":"additional","affiliation":[{"name":"CERT Systems Inc.  Toronto Ontario M6N 2J1 Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Christine M.","family":"Gabardo","sequence":"additional","affiliation":[{"name":"CERT Systems Inc.  Toronto Ontario M6N 2J1 Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Viktoria","family":"Golovanova","sequence":"additional","affiliation":[{"name":"ICFO \u2013 Institut de Ci\u00e8ncies Fot\u00f2niques The Barcelona Institute of Science and Technology  Barcelona 08860 Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"F. 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