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Pd based catalysts with Pd loadings of 0.2\u20132 wt.% over the obtained CaCO\n                    <jats:sub>3<\/jats:sub>\n                    supports were synthesized via excess impregnation, using palladium acetate as the precursor and acetone as the solvent. The Pd\/CaCO\n                    <jats:sub>3<\/jats:sub>\n                    catalysts were systematically characterized by XRD, N\n                    <jats:sub>2<\/jats:sub>\n                    adsorption\u2013desorption, TEM, EDS and XPS, and their low-temperature CO oxidation performance was evaluated. All catalysts exhibit mesoporous features with Type IV isotherms and Type H3 hysteresis loops, and 0.5Pd\/CaCO\n                    <jats:sub>3<\/jats:sub>\n                    displays the optimal specific surface area, pore volume and pore size. The average Pd particle size increases from 1.86 nm to 4.23 nm with rising Pd loading, and 0.5Pd\/CaCO\n                    <jats:sub>3<\/jats:sub>\n                    possesses highly dispersed ultrafine Pd particles of 2.21 nm. The control sample 0.5Pd\/precipitated CaCO\n                    <jats:sub>3<\/jats:sub>\n                    has a\n                    <jats:italic>T<\/jats:italic>\n                    <jats:sub>100<\/jats:sub>\n                    of 140 \u00b0C, while 0.5Pd\/CaCO\n                    <jats:sub>3<\/jats:sub>\n                    achieves complete CO conversion at 120 \u00b0C and retains stable conversion over 120 h of continuous testing, verifying the advantage of the self-made support. The better performance for calcining samples arises from the synergistic effect of Pd\n                    <jats:sup>0<\/jats:sup>\n                    and Pd\n                    <jats:sup>2+<\/jats:sup>\n                    , highly dispersed Pd nanoparticles, a developed mesoporous structure and the defect anchoring effect. This study provides a scalable, low-cost and efficient Pd-based catalytic approach for low-temperature CO oxidation.\n                  <\/jats:p>","DOI":"10.1088\/1361-6528\/aeaa5f","type":"journal-article","created":{"date-parts":[[2026,9,21]],"date-time":"2026-09-21T22:47:55Z","timestamp":1790030875000},"page":"395702","update-policy":"https:\/\/doi.org\/10.1088\/crossmark-policy","source":"Crossref","is-referenced-by-count":0,"title":["Preparation and catalytic performance of Pd\/CaCO\n                    <sub>3<\/sub>\n                    catalysts for low-temperature carbon monoxide oxidation"],"prefix":"10.1088","volume":"37","author":[{"given":"Xueyang","family":"Qi","sequence":"first","affiliation":[{"name":"Beijing Institute of Graphic Communication"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"data-curation","vocabulary":"credit"},{"role":"formal-analysis","vocabulary":"credit"},{"role":"visualization","vocabulary":"credit"},{"role":"writing-original-draft","vocabulary":"credit"}]},{"given":"Lihao","family":"Chen","sequence":"additional","affiliation":[{"name":"Beijing Institute of Graphic Communication"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"formal-analysis","vocabulary":"credit"},{"role":"visualization","vocabulary":"credit"}]},{"given":"Gangya","family":"Wei","sequence":"additional","affiliation":[{"name":"Beijing Institute of Graphic Communication"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0003-5291-2925","authenticated-orcid":true,"given":"Jiushan","family":"Cheng","sequence":"additional","affiliation":[{"name":"Beijing Institute of Graphic Communication"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"investigation","vocabulary":"credit"},{"role":"methodology","vocabulary":"credit"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9273-4666","authenticated-orcid":true,"given":"Zhongwei","family":"Liu","sequence":"additional","affiliation":[{"name":"Beijing Institute of Graphic Communication"}],"role":[{"vocabulary":"crossref","role":"author"},{"role":"conceptualization","vocabulary":"credit"},{"role":"funding-acquisition","vocabulary":"credit"},{"role":"methodology","vocabulary":"credit"},{"role":"writing-review-editing","vocabulary":"credit"}]}],"member":"266","published-online":{"date-parts":[[2026,9,30]]},"reference":[{"key":"nanoaeaa5fbib1","doi-asserted-by":"publisher","DOI":"10.1016\/j.chemosphere.2021.130285","type":"journal-article","volume":"277","author":"Hussain","year":"2021","journal-title":"Chemosphere"},{"key":"nanoaeaa5fbib2","doi-asserted-by":"publisher","first-page":"3880","DOI":"10.1016\/j.ijhydene.2007.03.031","type":"journal-article","volume":"32","author":"Huang","year":"2007","journal-title":"Int. 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All rights, including for text and data mining, AI training, and similar technologies, are reserved.","name":"copyright_information","label":"Copyright Information"},{"value":"2026-07-30","name":"date_received","label":"Date Received","group":{"name":"publication_dates","label":"Publication dates"}},{"value":"2026-09-21","name":"date_accepted","label":"Date Accepted","group":{"name":"publication_dates","label":"Publication dates"}},{"value":"2026-09-30","name":"date_epub","label":"Online publication date","group":{"name":"publication_dates","label":"Publication dates"}}]}}