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Among the diverse products, the C\n                    <jats:sub>2<\/jats:sub>\n                    compounds, including ethylene and ethanol, are particularly attractive due to their high commercial value and widespread industrial applications. Therefore, it is highly promising to improve the Faradaic efficiency (FE) of C\n                    <jats:sub>2<\/jats:sub>\n                    products during CO\n                    <jats:sub>2<\/jats:sub>\n                    ER. Herein, cuprous oxide (Cu\n                    <jats:sub>2<\/jats:sub>\n                    O) particles are partially encapsulated with silica (SiO\n                    <jats:sub>2<\/jats:sub>\n                    ) for significant improvement in FE of C\n                    <jats:sub>2<\/jats:sub>\n                    products during CO\n                    <jats:sub>2<\/jats:sub>\n                    ER. Compared with pristine Cu\n                    <jats:sub>2<\/jats:sub>\n                    O and SiO\n                    <jats:sub>2<\/jats:sub>\n                    \u2010fully encapsulated Cu\n                    <jats:sub>2<\/jats:sub>\n                    O, the SiO\n                    <jats:sub>2<\/jats:sub>\n                    \u2010partially encapsulated Cu\n                    <jats:sub>2<\/jats:sub>\n                    O demonstrates an improved FE of C\n                    <jats:sub>2<\/jats:sub>\n                    products to \u224870.9 \u00b1 3.1% in an H\u2010type cell. This unique improvement in FE of C\n                    <jats:sub>2<\/jats:sub>\n                    can be attributed to the accumulated\n                    <jats:sup>*<\/jats:sup>\n                    CO intermediates and well modulated C\u2013C coupling on a partially SiO\n                    <jats:sub>2<\/jats:sub>\n                    \u2010encapsulated Cu\u2010based catalyst. The optimized surface coverage of SiO\n                    <jats:sub>2<\/jats:sub>\n                    can not only modulate the electronic structure of Cu for an improved CO\n                    <jats:sub>2<\/jats:sub>\n                    ER (including C\u2013C coupling) but also expose enough continuous Cu surface for the coupling of two C\u2010containing intermediates. Therefore, the production of C\n                    <jats:sub>2<\/jats:sub>\n                    species can be significantly promoted. This work offers a valuable insight into the designing and development of highly selective CO\n                    <jats:sub>2<\/jats:sub>\n                    ER catalysts toward C\n                    <jats:sub>2<\/jats:sub>\n                    species.\n                  <\/jats:p>","DOI":"10.1002\/smll.202509694","type":"journal-article","created":{"date-parts":[[2025,10,6]],"date-time":"2025-10-06T23:38:14Z","timestamp":1759793894000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Partial Encapsulation of Cu\n                    <sub>2<\/sub>\n                    O with Silica for Improved Electroreduction of Carbon Dioxide to C\n                    <sub>2<\/sub>\n                    Species"],"prefix":"10.1002","volume":"21","author":[{"given":"Furong","family":"Qiao","sequence":"first","affiliation":[{"name":"State Key Laboratory of Flexible Electronics School of Flexible Electronics (Future Technologies) and Institute of Advanced Materials Nanjing Tech University 30 South Puzhu Road Nanjing 211816 P. 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