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Rational syntheses of core-shell Fe(x)@Pt nanoparticles for the study of electrocatalytic oxygen reduction reaction
We report on the syntheses of core-shell Fe(x)@Pt (x = 0.4–1.2) nanoparticles (NPs) with Pt-shell thickness systematically controlled while the overall particle size is constant. The syntheses were achieved via one-pot ultrasound-assisted polyol synthesis (UPS) reactions. Fe(1.2)@Pt showed a record-...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group
2013
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3791448/ https://www.ncbi.nlm.nih.gov/pubmed/24096587 http://dx.doi.org/10.1038/srep02872 |
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author | Jang, Ji-Hoon Lee, Eunjik Park, Jinwoo Kim, Gunn Hong, Suklyun Kwon, Young-Uk |
author_facet | Jang, Ji-Hoon Lee, Eunjik Park, Jinwoo Kim, Gunn Hong, Suklyun Kwon, Young-Uk |
author_sort | Jang, Ji-Hoon |
collection | PubMed |
description | We report on the syntheses of core-shell Fe(x)@Pt (x = 0.4–1.2) nanoparticles (NPs) with Pt-shell thickness systematically controlled while the overall particle size is constant. The syntheses were achieved via one-pot ultrasound-assisted polyol synthesis (UPS) reactions. Fe(1.2)@Pt showed a record-breaking high core-element content (55 at%) of core-shell NPs. Based on observations from a series of control experiments, we propose a mechanism of the NPs' formation that enables control of shell thickness in UPS reactions. Fe(x)@Pt NPs showed drastic enhancements in mass and specific activity for oxygen reduction reaction (ORR) and significantly enhanced durability compared to commercial Pt NPs. Fe(x)@Pt with a 1 (monolayer) ML Pt shell showed the highest activity. The ab initio density functional theory calculations on the binding energies of oxygen species on the surfaces of Fe(x)@Pt NPs showed that the 1 ML case is most favourable for the ORR, and in good agreement with the experimental results. |
format | Online Article Text |
id | pubmed-3791448 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2013 |
publisher | Nature Publishing Group |
record_format | MEDLINE/PubMed |
spelling | pubmed-37914482013-10-18 Rational syntheses of core-shell Fe(x)@Pt nanoparticles for the study of electrocatalytic oxygen reduction reaction Jang, Ji-Hoon Lee, Eunjik Park, Jinwoo Kim, Gunn Hong, Suklyun Kwon, Young-Uk Sci Rep Article We report on the syntheses of core-shell Fe(x)@Pt (x = 0.4–1.2) nanoparticles (NPs) with Pt-shell thickness systematically controlled while the overall particle size is constant. The syntheses were achieved via one-pot ultrasound-assisted polyol synthesis (UPS) reactions. Fe(1.2)@Pt showed a record-breaking high core-element content (55 at%) of core-shell NPs. Based on observations from a series of control experiments, we propose a mechanism of the NPs' formation that enables control of shell thickness in UPS reactions. Fe(x)@Pt NPs showed drastic enhancements in mass and specific activity for oxygen reduction reaction (ORR) and significantly enhanced durability compared to commercial Pt NPs. Fe(x)@Pt with a 1 (monolayer) ML Pt shell showed the highest activity. The ab initio density functional theory calculations on the binding energies of oxygen species on the surfaces of Fe(x)@Pt NPs showed that the 1 ML case is most favourable for the ORR, and in good agreement with the experimental results. Nature Publishing Group 2013-10-07 /pmc/articles/PMC3791448/ /pubmed/24096587 http://dx.doi.org/10.1038/srep02872 Text en Copyright © 2013, Macmillan Publishers Limited. All rights reserved http://creativecommons.org/licenses/by/3.0/ This work is licensed under a Creative Commons Attribution 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by/3.0/ |
spellingShingle | Article Jang, Ji-Hoon Lee, Eunjik Park, Jinwoo Kim, Gunn Hong, Suklyun Kwon, Young-Uk Rational syntheses of core-shell Fe(x)@Pt nanoparticles for the study of electrocatalytic oxygen reduction reaction |
title | Rational syntheses of core-shell Fe(x)@Pt nanoparticles for the study of electrocatalytic oxygen reduction reaction |
title_full | Rational syntheses of core-shell Fe(x)@Pt nanoparticles for the study of electrocatalytic oxygen reduction reaction |
title_fullStr | Rational syntheses of core-shell Fe(x)@Pt nanoparticles for the study of electrocatalytic oxygen reduction reaction |
title_full_unstemmed | Rational syntheses of core-shell Fe(x)@Pt nanoparticles for the study of electrocatalytic oxygen reduction reaction |
title_short | Rational syntheses of core-shell Fe(x)@Pt nanoparticles for the study of electrocatalytic oxygen reduction reaction |
title_sort | rational syntheses of core-shell fe(x)@pt nanoparticles for the study of electrocatalytic oxygen reduction reaction |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3791448/ https://www.ncbi.nlm.nih.gov/pubmed/24096587 http://dx.doi.org/10.1038/srep02872 |
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