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Facile synthesis of fully ordered L1(0)-FePt nanoparticles with controlled Pt-shell thicknesses for electrocatalysis

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dc.contributor.authorYonghoon Hong-
dc.contributor.authorHee Jin Kim-
dc.contributor.authorDaehee Yang-
dc.contributor.authorGaehang Lee-
dc.contributor.authorKi Min Nam-
dc.contributor.authorMyung-Hwa Jung-
dc.contributor.authorYoung-Min Kim-
dc.contributor.authorSang-Il Choi-
dc.contributor.authorWon Seok Seo-
dc.date.available2017-09-05T04:49:49Z-
dc.date.created2017-07-17-
dc.date.issued2017-08-
dc.identifier.issn1998-0124-
dc.identifier.urihttps://pr.ibs.re.kr/handle/8788114/3649-
dc.description.abstractWe report a simple one-step approach for the synthesis of similar to 4 nm uniform and fully L1(0)-ordered face-centered tetragonal (fct) FePt nanoparticles (NPs) embedded in similar to 60 nm MCM-41 (fct-FePt NPs@MCM-41). We controlled the Pt-shell thickness of the fct-FePt NPs by treating the fct-FePt NPs@MCM-41 with acetic acid (HOAc) or hydrochloric acid (HCl) under sonication, thereby etching the surface Fe atoms of the NPs. The fct-FePt NPs deposited onto the carbon support (fct-FePt NP/C) were prepared by mixing the fct-FePt NPs@MCM-41 with carbon and subsequently removing the MCM-41 using NaOH. We also developed a facile method to synthesize acid-treated fct-FePt NP/C by using a HF solution for simultaneous surface-Fe etching and MCM-41 removal. We studied the effects of both surface-Fe etching and Pt-shell thickness on the electrocatalytic properties of fct-FePt NPs for the methanol oxidation reaction (MOR). Compared with the non-treated fct-FePt NP/C catalyst, the HOAc-treated and HCl-treated catalysts exhibit up to 34% larger electrochemically active surface areas (ECASAs); in addition, the HCl-treated fct-FePt NP (with similar to 1.0 nm Pt shell)/C catalyst exhibits the highest specific activity. The HF-treated fct-FePt NP/C exhibits an ECASA almost 2 times larger than those of the other acid-treated fct-FePt NP/C catalysts and shows the highest mass activity (1,435 mA.mg(-1) Pt, 2.3 times higher than that of the commercial Pt/C catalyst) and stability among the catalysts tested. Our findings demonstrate that the surface-Fe etching for the generation of the Pt shell on fct-FePt NPs and the Pt-shell thickness can be factors for optimizing the electrocatalysis of the MOR. © Tsinghua University Press and Springer-Verlag Berlin Heidelberg 2017-
dc.description.uri1-
dc.language영어-
dc.publisherTSINGHUA UNIV PRESS-
dc.subjectFePt-
dc.subjectface centered tetragonal-
dc.subjectbimetallic-
dc.subjectmethanol oxidation reaction-
dc.subjectelectrocatalysts-
dc.titleFacile synthesis of fully ordered L1(0)-FePt nanoparticles with controlled Pt-shell thicknesses for electrocatalysis-
dc.typeArticle-
dc.type.rimsART-
dc.identifier.wosid000404560100028-
dc.identifier.scopusid2-s2.0-85018663282-
dc.identifier.rimsid59760ko
dc.date.tcdate2018-10-01-
dc.contributor.affiliatedAuthorYoung-Min Kim-
dc.identifier.doi10.1007/s12274-017-1495-5-
dc.identifier.bibliographicCitationNANO RESEARCH, v.10, no.8, pp.2866 - 2880-
dc.citation.titleNANO RESEARCH-
dc.citation.volume10-
dc.citation.number8-
dc.citation.startPage2866-
dc.citation.endPage2880-
dc.date.scptcdate2018-10-01-
dc.description.wostc3-
dc.description.scptc4-
dc.embargo.liftdate9999-12-31-
dc.embargo.terms9999-12-31-
dc.description.journalClass1-
dc.description.journalRegisteredClassscie-
dc.description.journalRegisteredClassscopus-
dc.subject.keywordPlusOXYGEN REDUCTION REACTION-
dc.subject.keywordPlusFCT-FEPT NANOPARTICLES-
dc.subject.keywordPlusDIRECT CHEMICAL-SYNTHESIS-
dc.subject.keywordPlusHIGH-INDEX FACETS-
dc.subject.keywordPlusFUEL-CELLS-
dc.subject.keywordPlusMAGNETIC NANOPARTICLES-
dc.subject.keywordPlusSUPPORTED CATALYSTS-
dc.subject.keywordPlusLOW-TEMPERATURE-
dc.subject.keywordPlusPARTICLE-SIZE-
dc.subject.keywordPlusNANOCRYSTALS-
dc.subject.keywordAuthorFePt-
dc.subject.keywordAuthorface centered tetragonal-
dc.subject.keywordAuthorbimetallic-
dc.subject.keywordAuthormethanol oxidation reaction-
dc.subject.keywordAuthorelectrocatalysts-
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > 1. Journal Papers (저널논문)
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