{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,28]],"date-time":"2026-10-28T13:09:10Z","timestamp":1793192950882,"version":"4.5.0"},"reference-count":147,"publisher":"MDPI AG","issue":"18","license":[{"start":{"date-parts":[[2026,9,21]],"date-time":"2026-09-21T00:00:00Z","timestamp":1789948800000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"National Science Foundation of Xinjiang","award":["2025B03028-3"],"award-info":[{"award-number":["2025B03028-3"]}]},{"award":["2025B03028-3"],"award-info":[{"award-number":["2025B03028-3"]}],"id":[{"id":"https:\/\/ror.org\/021nxhr62","id-type":"ROR","asserted-by":"publisher"}]},{"name":"National Natural Science Foundation of China","award":["22608464"],"award-info":[{"award-number":["22608464"]}],"id":[{"id":"https:\/\/ror.org\/01h0zpd94","id-type":"ROR","asserted-by":"crossref"}]},{"award":["22608464"],"award-info":[{"award-number":["22608464"]}],"id":[{"id":"https:\/\/ror.org\/01h0zpd94","id-type":"ROR","asserted-by":"publisher"}]},{"name":"National Natural Science Foundation of SiChuan","award":["2026NSFSC0045"],"award-info":[{"award-number":["2026NSFSC0045"]}]},{"name":"China Postdoctoral Science Foundation Project","award":["2025M781124"],"award-info":[{"award-number":["2025M781124"]}],"id":[{"id":"https:\/\/ror.org\/0426zh255","id-type":"ROR","asserted-by":"crossref"}]},{"award":["2025M781124"],"award-info":[{"award-number":["2025M781124"]}],"id":[{"id":"https:\/\/ror.org\/0426zh255","id-type":"ROR","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Nanomaterials"],"abstract":"<jats:p>CO and CO2 hydrogenation provide essential routes for linking carbon resource recycling with renewable hydrogen utilization, yet the predictable design of CeO2-based catalysts remains constrained by an incomplete understanding of how CeO2 defect chemistry couples with interfacial reaction pathways. This review adopts a function-oriented rather than a metal-by-metal enumeration approach, covering pristine CeO2, single-metal\/CeO2, bimetallic\/CeO2, and CeO2\u2013metal oxide composite catalysts. We argue that CeO2 should not be viewed merely as an oxygen vacancy reservoir; its catalytic function arises from the coupled effects of exposed crystal facets, Ce4+\/Ce3+ redox cycling, oxygen vacancy formation and migration, surface hydroxyl chemistry, water desorption, and dynamic metal\u2013oxide interfaces. In methanol synthesis, methanation, the reverse water\u2013gas shift reaction, and C2 oxygenate formation, the same structural descriptors may promote or suppress the target pathway, depending on oxygen vacancy location, metal nuclearity, oxide basicity, and intermediate binding strength. We further discuss how Cu-Ce interfaces regulate methanol versus CO production, how Ni-, Co-, and Ru-based interfaces promote deep hydrogenation, and how Pd-, Rh-, and composite oxide systems expand oxygenate selectivity. Finally, we emphasize that future research needs to develop in situ descriptors, quantitatively distinguish different types of oxygen vacancies, and evaluate catalyst stability under realistic environments including water-rich, CO-containing, and cyclic operation conditions. Reinterpreting CeO2 from a \u201creducible support\u201d to a \u201cprogrammable dynamic interface\u201d holds promise for advancing catalyst design for selective COx hydrogenation to CO, methane, methanol, and higher-carbon oxygenates.<\/jats:p>","DOI":"10.3390\/nano16181193","type":"journal-article","created":{"date-parts":[[2026,9,21]],"date-time":"2026-09-21T10:25:43Z","timestamp":1789986343000},"page":"1193","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["CO and CO2 Hydrogenation over CeO2 and CeO2-Based Composite Catalysts: Defect Chemistry, Interfacial Sites and Selectivity Control"],"prefix":"10.3390","volume":"16","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-7057-0867","authenticated-orcid":false,"given":"Guo","family":"Tian","sequence":"first","affiliation":[{"name":"Key Laboratory of Coal Clean Conversion & Chemical Engineering Process, School of Chemical Engineering, Xinjiang University, Urumqi 830046, China"},{"name":"Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology, Department of Chemical Engineering, Tsinghua University, Beijing 100084, China"},{"name":"Ordos Laboratory, Ordos 017010, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,9,21]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"e202112835","DOI":"10.1002\/anie.202112835","article-title":"Green carbon science: Efficient carbon resource processing, utilization, and recycling towards carbon neutrality","volume":"61","author":"He","year":"2022","journal-title":"Angew. 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