Growth Kinetics of Individual Co Particles Ex-solved on SrTi0.75Co0.25O3-delta Polycrystalline Perovskite Thin Films

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dc.contributor.authorJo, Yong-Ryunko
dc.contributor.authorKoo, Bonjaeko
dc.contributor.authorSeo, Min-Jiko
dc.contributor.authorKim, Jun Kyuko
dc.contributor.authorLee, Siwonko
dc.contributor.authorKim, Kyeounghakko
dc.contributor.authorHan, Jeong Wooko
dc.contributor.authorJung, WooChulko
dc.contributor.authorKim, Bong-Joongko
dc.date.accessioned2019-05-28T08:25:18Z-
dc.date.available2019-05-28T08:25:18Z-
dc.date.created2019-05-28-
dc.date.created2019-05-28-
dc.date.issued2019-04-
dc.identifier.citationJOURNAL OF THE AMERICAN CHEMICAL SOCIETY, v.141, no.16, pp.6690 - 6697-
dc.identifier.issn0002-7863-
dc.identifier.urihttp://hdl.handle.net/10203/262209-
dc.description.abstractA precise control of the size, density, and distribution of metal nanoparticles dispersed on functional oxide supports is critical for promoting catalytic activity and stability in renewable energy and catalysis devices. Here, we measure the growth kinetics of individual Co particles ex-solved on SrTi0.75Co0.25O3-delta polycrystalline thin films under a high vacuum, and at various temperatures and grain sizes using in situ transmission electron microscopy. The ex solution preferentially occurs at grain boundaries and corners which appear essential for controlling particle density and distribution, and enabling low temperature ex-solution. The particle reaches a saturated size after a few minutes, and the size depends on temperature. Quantitative measurements with a kinetic model determine the rate limiting step, vacancy formation enthalpy, ex-solution enthalpy, and activation energy for particle growth. The ex-solved particles are tightly socketed, preventing interactions among them over 800 degrees C. Furthermore, we obtain the first direct clarification of the active reaction site for CO oxidation-the Co-oxide interface, agreeing well with density functional theory calculations.-
dc.languageEnglish-
dc.publisherAMER CHEMICAL SOC-
dc.titleGrowth Kinetics of Individual Co Particles Ex-solved on SrTi0.75Co0.25O3-delta Polycrystalline Perovskite Thin Films-
dc.typeArticle-
dc.identifier.wosid000466053400035-
dc.identifier.scopusid2-s2.0-85064969856-
dc.type.rimsART-
dc.citation.volume141-
dc.citation.issue16-
dc.citation.beginningpage6690-
dc.citation.endingpage6697-
dc.citation.publicationnameJOURNAL OF THE AMERICAN CHEMICAL SOCIETY-
dc.identifier.doi10.1021/jacs.9b01882-
dc.contributor.localauthorJung, WooChul-
dc.contributor.nonIdAuthorJo, Yong-Ryun-
dc.contributor.nonIdAuthorSeo, Min-Ji-
dc.contributor.nonIdAuthorKim, Kyeounghak-
dc.contributor.nonIdAuthorHan, Jeong Woo-
dc.contributor.nonIdAuthorKim, Bong-Joong-
dc.description.isOpenAccessN-
dc.type.journalArticleArticle-
dc.subject.keywordPlusNANOPARTICLES-
dc.subject.keywordPlusOXIDATION-
dc.subject.keywordPlusTEMPERATURE-
dc.subject.keywordPlusEXSOLUTION-
dc.subject.keywordPlusEVOLUTION-
dc.subject.keywordPlusCLUSTERS-
dc.subject.keywordPlusDESIGN-
dc.subject.keywordPlusENERGY-
dc.subject.keywordPlusANODE-
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