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Antimony-doped graphene nanoplatelets

Heteroatom doping into the graphitic frameworks have been intensively studied for the development of metal-free electrocatalysts. However, the choice of heteroatoms is limited to non-metallic elements and heteroatom-doped graphitic materials do not satisfy commercial demands in terms of cost and sta...

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Autores principales: Jeon, In-Yup, Choi, Min, Choi, Hyun-Jung, Jung, Sun-Min, Kim, Min-Jung, Seo, Jeong-Min, Bae, Seo-Yoon, Yoo, Seonyoung, Kim, Guntae, Jeong, Hu Young, Park, Noejung, Baek, Jong-Beom
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Pub. Group 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4455135/
https://www.ncbi.nlm.nih.gov/pubmed/25997811
http://dx.doi.org/10.1038/ncomms8123
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author Jeon, In-Yup
Choi, Min
Choi, Hyun-Jung
Jung, Sun-Min
Kim, Min-Jung
Seo, Jeong-Min
Bae, Seo-Yoon
Yoo, Seonyoung
Kim, Guntae
Jeong, Hu Young
Park, Noejung
Baek, Jong-Beom
author_facet Jeon, In-Yup
Choi, Min
Choi, Hyun-Jung
Jung, Sun-Min
Kim, Min-Jung
Seo, Jeong-Min
Bae, Seo-Yoon
Yoo, Seonyoung
Kim, Guntae
Jeong, Hu Young
Park, Noejung
Baek, Jong-Beom
author_sort Jeon, In-Yup
collection PubMed
description Heteroatom doping into the graphitic frameworks have been intensively studied for the development of metal-free electrocatalysts. However, the choice of heteroatoms is limited to non-metallic elements and heteroatom-doped graphitic materials do not satisfy commercial demands in terms of cost and stability. Here we realize doping semimetal antimony (Sb) at the edges of graphene nanoplatelets (GnPs) via a simple mechanochemical reaction between pristine graphite and solid Sb. The covalent bonding of the metalloid Sb with the graphitic carbon is visualized using atomic-resolution transmission electron microscopy. The Sb-doped GnPs display zero loss of electrocatalytic activity for oxygen reduction reaction even after 100,000 cycles. Density functional theory calculations indicate that the multiple oxidation states (Sb(3+) and Sb(5+)) of Sb are responsible for the unusual electrochemical stability. Sb-doped GnPs may provide new insights and practical methods for designing stable carbon-based electrocatalysts.
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spelling pubmed-44551352015-06-18 Antimony-doped graphene nanoplatelets Jeon, In-Yup Choi, Min Choi, Hyun-Jung Jung, Sun-Min Kim, Min-Jung Seo, Jeong-Min Bae, Seo-Yoon Yoo, Seonyoung Kim, Guntae Jeong, Hu Young Park, Noejung Baek, Jong-Beom Nat Commun Article Heteroatom doping into the graphitic frameworks have been intensively studied for the development of metal-free electrocatalysts. However, the choice of heteroatoms is limited to non-metallic elements and heteroatom-doped graphitic materials do not satisfy commercial demands in terms of cost and stability. Here we realize doping semimetal antimony (Sb) at the edges of graphene nanoplatelets (GnPs) via a simple mechanochemical reaction between pristine graphite and solid Sb. The covalent bonding of the metalloid Sb with the graphitic carbon is visualized using atomic-resolution transmission electron microscopy. The Sb-doped GnPs display zero loss of electrocatalytic activity for oxygen reduction reaction even after 100,000 cycles. Density functional theory calculations indicate that the multiple oxidation states (Sb(3+) and Sb(5+)) of Sb are responsible for the unusual electrochemical stability. Sb-doped GnPs may provide new insights and practical methods for designing stable carbon-based electrocatalysts. Nature Pub. Group 2015-05-22 /pmc/articles/PMC4455135/ /pubmed/25997811 http://dx.doi.org/10.1038/ncomms8123 Text en Copyright © 2015, Nature Publishing Group, a division of Macmillan Publishers Limited. All Rights Reserved. http://creativecommons.org/licenses/by/4.0/ This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article's Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/
spellingShingle Article
Jeon, In-Yup
Choi, Min
Choi, Hyun-Jung
Jung, Sun-Min
Kim, Min-Jung
Seo, Jeong-Min
Bae, Seo-Yoon
Yoo, Seonyoung
Kim, Guntae
Jeong, Hu Young
Park, Noejung
Baek, Jong-Beom
Antimony-doped graphene nanoplatelets
title Antimony-doped graphene nanoplatelets
title_full Antimony-doped graphene nanoplatelets
title_fullStr Antimony-doped graphene nanoplatelets
title_full_unstemmed Antimony-doped graphene nanoplatelets
title_short Antimony-doped graphene nanoplatelets
title_sort antimony-doped graphene nanoplatelets
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4455135/
https://www.ncbi.nlm.nih.gov/pubmed/25997811
http://dx.doi.org/10.1038/ncomms8123
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