Effect of post heat-treatment of composition-controlled PdFe nanoparticles for oxygen reduction reaction

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dc.contributor.authorKang, Yun Sikko
dc.contributor.authorChoi, Kwang-Hyunko
dc.contributor.authorAhn, Docheonko
dc.contributor.authorLee, Myeong Jaeko
dc.contributor.authorBaik, Jaeyoonko
dc.contributor.authorChung, Dong Youngko
dc.contributor.authorKim, Mi-Juko
dc.contributor.authorLee, Stanfield Youngwonko
dc.contributor.authorKim, Minhyoungko
dc.contributor.authorShin, Heejongko
dc.contributor.authorLee, Kug-Seungko
dc.contributor.authorSung, Yung-Eunko
dc.date.accessioned2022-07-04T08:01:44Z-
dc.date.available2022-07-04T08:01:44Z-
dc.date.created2022-07-04-
dc.date.issued2016-01-
dc.identifier.citationJOURNAL OF POWER SOURCES, v.303, pp.234 - 242-
dc.identifier.issn0378-7753-
dc.identifier.urihttp://hdl.handle.net/10203/297213-
dc.description.abstractComposition-controlled and carbon-supported PdFe nanoparticles (NPs) were prepared via a modified chemical synthesis after heat-treatment at high temperature under a reductive atmosphere. This novel synthesis, which combines the polyol reduction method and hydride method, was used to obtain monodispersed PdFe NPs. In addition, to induce structural modifications, the as-prepared PdFe NPs received heat-treatment under a reductive atmosphere. Structural characterization, including high resolution powder diffraction (HRPD), X-ray photoelectron spectroscopy (XPS), and X-ray absorption spectroscopy (XAS) analysis, indicated that heat-treated PdFe NPs exhibited a higher degree of alloying and surface Pd atomic composition compared with as-prepared ones. Furthermore, new crystalline phases were detected after heat-treatment. Thanks to the structural alterations, heat-treated PdFe NPs showed similar to 3 and similar to 18 times higher mass- and area-normalized oxygen reduction reaction (ORR) activities, respectively than commercial Pt/C. Single cell testing with heat-treated PdFe catalysts exhibited a similar to 2.5 times higher mass-normalized maximum power density than the reference cell. Surface structure analyses, including cyclic voltammetry (CV), COad oxidation, and XPS, revealed that, after heat-treatment, a downshift of the Pd d-band center occurred, which led to a decrease in the affinity of Pd for oxygen species, resulting in more favorable ORR kinetics. (C) 2015 Elsevier B.V. All rights reserved.-
dc.languageEnglish-
dc.publisherELSEVIER-
dc.titleEffect of post heat-treatment of composition-controlled PdFe nanoparticles for oxygen reduction reaction-
dc.typeArticle-
dc.identifier.wosid000370463400029-
dc.identifier.scopusid2-s2.0-84946761602-
dc.type.rimsART-
dc.citation.volume303-
dc.citation.beginningpage234-
dc.citation.endingpage242-
dc.citation.publicationnameJOURNAL OF POWER SOURCES-
dc.identifier.doi10.1016/j.jpowsour.2015.11.011-
dc.contributor.localauthorChung, Dong Young-
dc.contributor.nonIdAuthorKang, Yun Sik-
dc.contributor.nonIdAuthorChoi, Kwang-Hyun-
dc.contributor.nonIdAuthorAhn, Docheon-
dc.contributor.nonIdAuthorLee, Myeong Jae-
dc.contributor.nonIdAuthorBaik, Jaeyoon-
dc.contributor.nonIdAuthorKim, Mi-Ju-
dc.contributor.nonIdAuthorLee, Stanfield Youngwon-
dc.contributor.nonIdAuthorKim, Minhyoung-
dc.contributor.nonIdAuthorShin, Heejong-
dc.contributor.nonIdAuthorLee, Kug-Seung-
dc.contributor.nonIdAuthorSung, Yung-Eun-
dc.description.isOpenAccessN-
dc.type.journalArticleArticle-
dc.subject.keywordAuthorOxygen reduction reaction-
dc.subject.keywordAuthorPdFe nanoparticles-
dc.subject.keywordAuthorPd surface segregation-
dc.subject.keywordAuthorPd d-band-
dc.subject.keywordAuthorPd K-edge-
dc.subject.keywordPlusENHANCED ACTIVITY-
dc.subject.keywordPlusSURFACE SEGREGATION-
dc.subject.keywordPlusALLOY CATALYSTS-
dc.subject.keywordPlusMETAL CATALYSTS-
dc.subject.keywordPlusELECTROCATALYSTS-
dc.subject.keywordPlusSTABILITY-
dc.subject.keywordPlusCO-
dc.subject.keywordPlusPERFORMANCE-
dc.subject.keywordPlusADSORPTION-
dc.subject.keywordPlusMONOLAYER-
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