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dc.citation.endPage 6885 -
dc.citation.number 8 -
dc.citation.startPage 6880 -
dc.citation.title INTERNATIONAL JOURNAL OF HYDROGEN ENERGY -
dc.citation.volume 37 -
dc.contributor.author You, Dae Jong -
dc.contributor.author Kwon, Kyungjung -
dc.contributor.author Joo, Sang Hoon -
dc.contributor.author Kim, Jin Hoe -
dc.contributor.author Kim, Ji Man -
dc.contributor.author Pak, Chanho -
dc.contributor.author Chang, Hyuk -
dc.date.accessioned 2023-12-22T05:13:20Z -
dc.date.available 2023-12-22T05:13:20Z -
dc.date.created 2013-06-10 -
dc.date.issued 2012-04 -
dc.description.abstract Carbon-supported Pt nanoparticle catalysts with ultra-high loading up to 85% are prepared by multi-step reduction (Pt/C-nR), in which additional Pt precursors are reduced upon a preformed Pt/C catalyst (Pt/C-1R). Transmission electron microscopy images show that the Pt/C-nR catalysts are composed of multilayers of Pt nanoparticles. The multiply stacked morphology in the Pt/C-nR catalysts may originate from the local overgrowth of additionally reduced Pt nanoparticles on the pre-existing Pt nanoparticles in the Pt/C-1R catalyst rather than conformal growth. The electrochemical characterizations by cyclic voltammograms in HClO4 solution reveal that Pt/C-2R catalyst exhibits an increased Pt utilization over the Pt/C-1R catalyst of the same Pt loading on the carbon support where a significant portion of catalytically active surfaces are buried within micropores of carbons. Furthermore, a direct methanol fuel cell (DMFC) single cell employing Pt/C-2R catalyst exhibits an enhanced DMFC performance compared to a single cell using the Pt/C-1R catalyst, demonstrating the importance of morphological control of Pt nanoparticles that can improve the catalyst utilization. -
dc.identifier.bibliographicCitation INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, v.37, no.8, pp.6880 - 6885 -
dc.identifier.doi 10.1016/j.ijhydene.2012.01.103 -
dc.identifier.issn 0360-3199 -
dc.identifier.scopusid 2-s2.0-84859219234 -
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/2993 -
dc.identifier.url http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84859219234 -
dc.identifier.wosid 000303952300060 -
dc.language 영어 -
dc.publisher PERGAMON-ELSEVIER SCIENCE LTD -
dc.title Carbon-supported ultra-high loading Pt nanoparticle catalyst by controlled overgrowth of Pt: Improvement of Pt utilization leads to enhanced direct methanol fuel cell performance -
dc.type Article -
dc.relation.journalWebOfScienceCategory Chemistry, Physical; Electrochemistry; Energy & Fuels -
dc.relation.journalResearchArea Chemistry; Electrochemistry; Energy & Fuels -
dc.description.journalRegisteredClass scie -
dc.description.journalRegisteredClass scopus -
dc.subject.keywordAuthor Pt nanoparticle -
dc.subject.keywordAuthor Ultra-high metal loading -
dc.subject.keywordAuthor Multi-step reduction -
dc.subject.keywordAuthor Catalyst utilization -
dc.subject.keywordAuthor Direct methanol fuel cell -
dc.subject.keywordPlus ELECTROCATALYTIC ACTIVITY -
dc.subject.keywordPlus OXYGEN REDUCTION -
dc.subject.keywordPlus CATHODE CATALYST -
dc.subject.keywordPlus POLYOL SYNTHESIS -
dc.subject.keywordPlus PARTICLE-SIZE -
dc.subject.keywordPlus PLATINUM -
dc.subject.keywordPlus OXIDATION -
dc.subject.keywordPlus ELECTROLYTE -
dc.subject.keywordPlus ACID -

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