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Copper\u2010based catalysts are found to be the star materials for obtaining longer\u2010chain carbon compounds beyond 2e<jats:sup>\u2212<\/jats:sup> products. Herein, we report a facile hydrothermal fabrication of a highly robust electrocatalyst: in\u2010situ grown heterostructures of plate\u2010like CuO\u2212Cu<jats:sub>2<\/jats:sub>O on carbon black. Simultaneous synthesis of copper\u2010carbon catalysts with varied amounts of copper was conducted to determine the optimum blend. It is observed that the optimum ratio and structure have aided in achieving the state of art faradaic efficiency for ethylene &gt;45\u2009% at \u22121.6\u2005V vs. RHE at industrially relevant high current densities over 160 to 200\u2005mA\u2009\u22c5\u2009cm<jats:sup>\u22122<\/jats:sup>. It is understood that the in\u2010situ modification of CuO to Cu<jats:sub>2<\/jats:sub>O during the electrolysis is the driving force for the highly selective conversion of CO<jats:sub>2<\/jats:sub> to ethylene through the *CO intermediates at the onset potentials followed by C\u2212C coupling. The excellent distribution of Cu\u2010based platelets on the carbon structure enables rapid electron transfer and enhanced catalytic efficiency. It is inferred that choosing the right composition of the catalyst by tuning the catalyst layer over the gas diffusion electrode can substantially affect the product selectivity and promote reaching the potential industrial scale.<\/jats:p>","DOI":"10.1002\/cssc.202300344","type":"journal-article","created":{"date-parts":[[2023,6,12]],"date-time":"2023-06-12T10:22:25Z","timestamp":1686565345000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["Hydrothermal Fabrication of Carbon\u2010Supported Oxide\u2010Derived Copper Heterostructures: A Robust Catalyst System for Enhanced Electro\u2010Reduction of CO<sub>2<\/sub> to C<sub>2<\/sub>H<sub>4<\/sub>"],"prefix":"10.1002","volume":"16","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-3142-6528","authenticated-orcid":false,"given":"Venkata S. R. 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