Structural and catalytic effect of Fe and Co incorporation into CeVO4 for NH3-SCR process

Structural and catalytic effect of Fe and Co incorporation into CeVO4 for NH3-SCR process | Research Square window.SnipcartSettings = { analytics: { enabled: false } }; (function() { var accessVector = localStorage.getItem('access_vector') || ''; window.dataLayer = window.dataLayer || []; if (accessVector) { window.dataLayer.push({ user: { profile: { profileInfo: { snid: accessVector } } } }); } })(); (function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src='https://www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);})(window,document,'script','dataLayer','GTM-K279D39R'); Browse Preprints In Review Journals COVID-19 Preprints AJE Video Bytes Research Tools Research Promotion AJE Professional Editing AJE Rubriq About Preprint Platform In Review Editorial Policies Our Team Advisory Board Help Center Sign In Submit a Preprint Cite Share Download PDF Research Article Structural and catalytic effect of Fe and Co incorporation into CeVO 4 for NH 3 -SCR process Jun-Hee Jeong, Seojin Lee, Byeong Wan Kwon This is a preprint; it has not been peer reviewed by a journal. https://doi.org/ 10.21203/rs.3.rs-7756063/v1 This work is licensed under a CC BY 4.0 License Status: Published Journal Publication published 08 Dec, 2025 Read the published version in Korean Journal of Chemical Engineering → Version 1 posted 4 You are reading this latest preprint version Abstract Selective catalytic reduction is widely applied to various industries for NO x removal. In this study, CeVO 4 -based catalysts were modified with iron and cobalt to enhance catalytic activity. Each transition metal was partially substituted into either the Ce or V site at 0.2 molar ratio. The synthesized catalysts exhibited both partial incorporation of the transition metal into the CeVO 4 lattice and the formation of secondary metal oxide phases. In particular, the V site substitution led to lattice expansion, CeO 2 formation, and smaller particle sizes, while Ce site substitution caused lattice contraction and larger particle sizes. After all catalysts were coated on the alumina pellet to protect the reactor from increasing pressure during the catalytic reduction reaction and boost the catalytic activities, those were evaluated under both oxygen absence and 1 mol% oxygen flow conditions. Among them, the CeVO 4 -CeO 2 -Co 3 V 2 O 8 /Al 2 O 3 catalyst (Ce:V:Co = 1:0.8:0.2 molar ratio) exhibited the highest NO conversion. This result was attributed to synergistic effects, including the promotional effect of CeO 2 , and enhanced oxygen migration via the asymmetric Co 3+ -O-V 5+ phase. Therefore, transition metal incorporation, particularly Co substitution at V sites, effectively enhances the catalytic activity of CeVO 4 -based catalysts in the NH 3 -SCR process. NH3-SCR CeVO4-based catalyst transition metal modification synergistic enhancement Full Text Cite Share Download PDF Status: Published Journal Publication published 08 Dec, 2025 Read the published version in Korean Journal of Chemical Engineering → Version 1 posted Reviewers agreed at journal 22 Oct, 2025 Reviewers invited by journal 21 Oct, 2025 Editor assigned by journal 06 Oct, 2025 First submitted to journal 30 Sep, 2025 You are reading this latest preprint version Research Square lets you share your work early, gain feedback from the community, and start making changes to your manuscript prior to peer review in a journal. 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Also discoverable on Platform About Our Team In Review Editorial Policies Advisory Board Help Center Resources Author Services Accessibility API Access RSS feed Manage Cookie Preferences © Research Square 2026 | ISSN 2693-5015 (online) Privacy Policy Terms of Service Do Not Sell My Personal Information {"props":{"pageProps":{"initialData":{"identity":"rs-7756063","acceptedTermsAndConditions":true,"allowDirectSubmit":false,"archivedVersions":[],"articleType":"Research Article","associatedPublications":[],"authors":[{"id":532847059,"identity":"fce3aef3-3cda-4bbe-9ed3-397ae8becbf8","order_by":0,"name":"Jun-Hee Jeong","email":"","orcid":"","institution":"Kangwon National University - Samcheok Campus","correspondingAuthor":false,"prefix":"","firstName":"Jun-Hee","middleName":"","lastName":"Jeong","suffix":""},{"id":532847060,"identity":"dc83be14-24de-4538-972e-aabc26936add","order_by":1,"name":"Seojin Lee","email":"","orcid":"","institution":"Kangwon National University - Samcheok 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process\u003c/p\u003e","fulltext":[],"fulltextSource":"","fullText":"","funders":[],"hasAdminPriorityOnWorkflow":false,"hasManuscriptDocX":false,"hasOptedInToPreprint":true,"hasPassedJournalQc":"","hasAnyPriority":false,"hideJournal":false,"highlight":"","institution":"","isAcceptedByJournal":true,"isAuthorSuppliedPdf":true,"isDeskRejected":"","isHiddenFromSearch":false,"isInQc":false,"isInWorkflow":true,"isPdf":true,"isPdfUpToDate":true,"isWithdrawnOrRetracted":false,"journal":{"display":true,"email":"[email protected]","identity":"korean-journal-of-chemical-engineering","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":false,"externalIdentity":"kjce","sideBox":"Learn more about [Korean Journal of Chemical Engineering](http://link.springer.com/journal/11814)","snPcode":"11814","submissionUrl":"https://www.editorialmanager.com/kjce/default2.aspx","title":"Korean Journal of Chemical Engineering","twitterHandle":"","acdcEnabled":true,"dfaEnabled":true,"editorialSystem":"em","reportingPortfolio":"Springer Subscription","inReviewEnabled":true,"inReviewRevisionsEnabled":false},"keywords":"NH3-SCR, CeVO4-based catalyst, transition metal modification, synergistic enhancement","lastPublishedDoi":"10.21203/rs.3.rs-7756063/v1","lastPublishedDoiUrl":"https://doi.org/10.21203/rs.3.rs-7756063/v1","license":{"name":"CC BY 4.0","url":"https://creativecommons.org/licenses/by/4.0/"},"manuscriptAbstract":"\u003cp\u003eSelective catalytic reduction is widely applied to various industries for NO\u003csub\u003ex\u003c/sub\u003e removal. In this study, CeVO\u003csub\u003e4\u003c/sub\u003e-based catalysts were modified with iron and cobalt to enhance catalytic activity. Each transition metal was partially substituted into either the Ce or V site at 0.2 molar ratio. The synthesized catalysts exhibited both partial incorporation of the transition metal into the CeVO\u003csub\u003e4\u003c/sub\u003e lattice and the formation of secondary metal oxide phases. In particular, the V site substitution led to lattice expansion, CeO\u003csub\u003e2\u003c/sub\u003e formation, and smaller particle sizes, while Ce site substitution caused lattice contraction and larger particle sizes. After all catalysts were coated on the alumina pellet to protect the reactor from increasing pressure during the catalytic reduction reaction and boost the catalytic activities, those were evaluated under both oxygen absence and 1 mol% oxygen flow conditions. Among them, the CeVO\u003csub\u003e4\u003c/sub\u003e-CeO\u003csub\u003e2\u003c/sub\u003e-Co\u003csub\u003e3\u003c/sub\u003eV\u003csub\u003e2\u003c/sub\u003eO\u003csub\u003e8\u003c/sub\u003e/Al\u003csub\u003e2\u003c/sub\u003eO\u003csub\u003e3\u003c/sub\u003e catalyst (Ce:V:Co\u0026thinsp;=\u0026thinsp;1:0.8:0.2 molar ratio) exhibited the highest NO conversion. This result was attributed to synergistic effects, including the promotional effect of CeO\u003csub\u003e2\u003c/sub\u003e, and enhanced oxygen migration via the asymmetric Co\u003csup\u003e3+\u003c/sup\u003e-O-V\u003csup\u003e5+\u003c/sup\u003e phase. Therefore, transition metal incorporation, particularly Co substitution at V sites, effectively enhances the catalytic activity of CeVO\u003csub\u003e4\u003c/sub\u003e-based catalysts in the NH\u003csub\u003e3\u003c/sub\u003e-SCR process.\u003c/p\u003e","manuscriptTitle":"Structural and catalytic effect of Fe and Co incorporation into CeVO4 for NH3-SCR process","msid":"","msnumber":"","nonDraftVersions":[{"code":1,"date":"2025-11-01 01:19:19","doi":"10.21203/rs.3.rs-7756063/v1","editorialEvents":[{"type":"communityComments","content":0},{"type":"reviewerAgreed","content":"","date":"2025-10-22T13:35:47+00:00","index":0,"fulltext":""},{"type":"reviewersInvited","content":"","date":"2025-10-21T12:29:05+00:00","index":"","fulltext":""},{"type":"editorAssigned","content":"","date":"2025-10-06T06:31:53+00:00","index":"","fulltext":""},{"type":"submitted","content":"Korean Journal of Chemical Engineering","date":"2025-09-30T23:44:54+00:00","index":"","fulltext":""}],"status":"published","journal":{"display":true,"email":"[email protected]","identity":"korean-journal-of-chemical-engineering","isNatureJournal":false,"hasQc":true,"allowDirectSubmit":false,"externalIdentity":"kjce","sideBox":"Learn more about [Korean Journal of Chemical Engineering](http://link.springer.com/journal/11814)","snPcode":"11814","submissionUrl":"https://www.editorialmanager.com/kjce/default2.aspx","title":"Korean Journal of Chemical Engineering","twitterHandle":"","acdcEnabled":true,"dfaEnabled":true,"editorialSystem":"em","reportingPortfolio":"Springer Subscription","inReviewEnabled":true,"inReviewRevisionsEnabled":false}}],"origin":"","ownerIdentity":"fcc827f5-ee18-49e9-948b-a769cc1bcace","owner":[],"postedDate":"November 1st, 2025","published":true,"recentEditorialEvents":[],"rejectedJournal":[],"revision":"","amendment":"","status":"published-in-journal","subjectAreas":[],"tags":[],"updatedAt":"2025-12-15T16:13:10+00:00","versionOfRecord":{"articleIdentity":"rs-7756063","link":"https://doi.org/10.1007/s11814-025-00611-0","journal":{"identity":"korean-journal-of-chemical-engineering","isVorOnly":false,"title":"Korean Journal of Chemical Engineering"},"publishedOn":"2025-12-08 15:56:51","publishedOnDateReadable":"December 8th, 2025"},"versionCreatedAt":"2025-11-01 01:19:19","video":"","vorDoi":"10.1007/s11814-025-00611-0","vorDoiUrl":"https://doi.org/10.1007/s11814-025-00611-0","workflowStages":[]},"version":"v1","identity":"rs-7756063","journalConfig":"researchsquare"},"__N_SSP":true},"page":"/article/[identity]/[[...version]]","query":{"redirect":"/article/rs-7756063","identity":"rs-7756063","version":["v1"]},"buildId":"8U1c8b4HqxoKbykW_rLl7","isFallback":false,"isExperimentalCompile":false,"dynamicIds":[84888],"gssp":true,"scriptLoader":[]}