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The present study addresses this challenge by introducing cerium (Ce) doping into La\n                    <jats:sub>2<\/jats:sub>\n                    CuO\n                    <jats:sub>4<\/jats:sub>\n                    . The Ce doping facilitates\n                    <jats:italic>f<\/jats:italic>\n                    \u2013\n                    <jats:italic>d<\/jats:italic>\n                    orbital coupling between Ce 4\n                    <jats:italic>f<\/jats:italic>\n                    and Cu 3\n                    <jats:italic>d<\/jats:italic>\n                    orbitals, suppressing electron enrichment around Cu atoms by transferring electrons from Cu 3\n                    <jats:italic>d<\/jats:italic>\n                    orbitals to Ce 4\n                    <jats:italic>f<\/jats:italic>\n                    orbitals via a Cu\u2212O\u2212Ce chain. These changes modulate the electronic structure of Cu, reduce the distance between neighboring Cu atoms, optimize the binding energy of surface\u2010adsorbed CO (*CO), and lower the reaction energy barrier for *CO dimerization. As a result, the La\n                    <jats:sub>1.95<\/jats:sub>\n                    Ce\n                    <jats:sub>0.05<\/jats:sub>\n                    CuO\n                    <jats:sub>4<\/jats:sub>\n                    catalyst achieves a Faradaic efficiency up to 81% for C\n                    <jats:sub>2+<\/jats:sub>\n                    products and maintains high stability over 50 h operation. This work highlights the unique role of Ce doping in stabilizing Cu\n                    <jats:sup>\u03b4+<\/jats:sup>\n                    sites and hence enhancing C\u2212C coupling, providing a pathway for designing efficient catalysts for eCO\n                    <jats:sub>2<\/jats:sub>\n                    RR.\n                  <\/jats:p>","DOI":"10.1002\/smtd.202500005","type":"journal-article","created":{"date-parts":[[2025,3,12]],"date-time":"2025-03-12T01:52:58Z","timestamp":1741744378000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":13,"title":["Stabilizing Oxidation State of Cu via Ce Doping into La\n                    <sub>2<\/sub>\n                    CuO\n                    <sub>4<\/sub>\n                    for Enhanced Electroreduction of CO\n                    <sub>2<\/sub>\n                    to Multicarbon Products"],"prefix":"10.1002","volume":"9","author":[{"given":"Tingting","family":"Wan","sequence":"first","affiliation":[{"name":"College of Chemistry and Molecular Sciences Hubei Key Laboratory of Electrochemical Power Sources Wuhan University  Wuhan 430072 P. 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China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Di","family":"Hu","sequence":"additional","affiliation":[{"name":"Department of Chemical and Environmental Engineering University of Nottingham Ningbo China  Ningbo 315100 P.R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Juanxiu","family":"Xiao","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Marine Resources Utilization in South China Sea Collaborative Innovation Center of Marine Science and Technology School of Marine Science and Engineering Hainan University  Haikou 570228 P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5244-797X","authenticated-orcid":false,"given":"Wei","family":"Xiao","sequence":"additional","affiliation":[{"name":"College of Chemistry and Molecular Sciences Hubei Key Laboratory of Electrochemical Power Sources Wuhan University  Wuhan 430072 P. R. 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