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Strontium doping at the A sites of perovskite oxides can potentially enhance their performance in these applications. However, the segregation of Sr\n                    <jats:sup>2+<\/jats:sup>\n                    to form inert phases, driven by its enrichment on surfaces, renders perovskite oxide materials unstable and inefficient during long\u2010term operation. Here, we design a Sr\n                    <jats:sup>2+<\/jats:sup>\n                    cation trap by introducing SrMoO\n                    <jats:sub>4<\/jats:sub>\n                    during cell fabrication, which partially transforms into conductive SrMoO\n                    <jats:sub>3<\/jats:sub>\n                    under reducing conditions. In the scenario of the high\u2010temperature CO\n                    <jats:sub>2<\/jats:sub>\n                    reduction reaction (HT\u2010CO\n                    <jats:sub>2<\/jats:sub>\n                    RR), this conductive cation trap effectively prevents Sr\n                    <jats:sup>2+<\/jats:sup>\n                    segregation in electrochemically inert SrCO\n                    <jats:sub>3<\/jats:sub>\n                    phases, concurrently enhancing electrode conductivity and electrocatalytic activity. As a result, we demonstrate, using catalysts consisting of Pr\n                    <jats:sub>0.90<\/jats:sub>\n                    Sr\n                    <jats:sub>0.10<\/jats:sub>\n                    Co\n                    <jats:sub>0.95<\/jats:sub>\n                    Cu\n                    <jats:sub>0.05<\/jats:sub>\n                    O\n                    <jats:sub>3\u2010\u03b4<\/jats:sub>\n                    and 19 wt.% SrMoO\n                    <jats:sub>4<\/jats:sub>\n                    , a one\u2010order\u2010magnitude reduction of degradation rate compared to the case without cation trapping. We report a current density of 3 A cm\n                    <jats:sup>\u22122<\/jats:sup>\n                    at 1.57\u00a0V, along with near\u2010unity Faradaic efficiencies (FEs) for CO, energy efficiencies (EEs) exceeding 70%, and stable operation for over 160 h at 1 A cm\n                    <jats:sup>\u22122<\/jats:sup>\n                    without degradation.\n                  <\/jats:p>","DOI":"10.1002\/adma.202521954","type":"journal-article","created":{"date-parts":[[2025,12,31]],"date-time":"2025-12-31T13:58:57Z","timestamp":1767189537000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":4,"title":["Conductive Cation Traps for Synthesizing Efficient and Stable Perovskite Catalysts"],"prefix":"10.1002","volume":"38","author":[{"given":"Tongbao","family":"Wang","sequence":"first","affiliation":[{"name":"State Key Laboratory of Bioinspired Interfacial Materials Science Institute of Functional Nano &amp; Soft Materials (FUNSOM) Soochow University  Suzhou Jiangsu China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Chao","family":"Yang","sequence":"additional","affiliation":[{"name":"Laboratory of Advanced Materials Department of Chemistry Fudan University  Shanghai China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fupeng","family":"Cheng","sequence":"additional","affiliation":[{"name":"Shanghai Institute of Applied Physics Chinese Academy of Sciences  Shanghai China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Bin","family":"Song","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Bioinspired Interfacial Materials Science Institute of Functional Nano &amp; Soft Materials (FUNSOM) Soochow University  Suzhou Jiangsu China"},{"name":"Jiangsu Key Laboratory for Carbon\u2010based Functional Materials &amp; Devices Soochow University  Suzhou Jiangsu China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tong","family":"Liu","sequence":"additional","affiliation":[{"name":"i\u2010LAB Vacuum Interconnected Nanotech Workstation Suzhou Institute of Nano\u2010Tech and Nano\u2010Bionics Chinese Academy of Sciences  Suzhou China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xiwen","family":"Tan","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Bioinspired Interfacial Materials Science Institute of Functional Nano &amp; Soft Materials (FUNSOM) Soochow University  Suzhou Jiangsu China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Quan","family":"Chen","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Bioinspired Interfacial Materials Science Institute of Functional Nano &amp; Soft Materials (FUNSOM) Soochow University  Suzhou Jiangsu 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