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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...
Autores principales: | , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Pub. Group
2015
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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. |
format | Online Article Text |
id | pubmed-4455135 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | Nature Pub. Group |
record_format | MEDLINE/PubMed |
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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