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Small Reduced Graphene Oxides for Highly Efficient Oxygen Reduction Catalysts

We demonstrated highly efficient oxygen reduction catalysts composed of uniform Pt nanoparticles on small, reduced graphene oxides (srGO). The reduced graphene oxide (rGO) size was controlled by applying ultrasonication, and the resultant srGO enabled the morphological control of the Pt nanoparticle...

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Detalles Bibliográficos
Autores principales: Bak, Su-Jeong, Kim, Sun-I, Lim, Su-yeong, Kim, Taehyo, Kwon, Se-Hun, Lee, Duck Hyun
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8625579/
https://www.ncbi.nlm.nih.gov/pubmed/34830182
http://dx.doi.org/10.3390/ijms222212300
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author Bak, Su-Jeong
Kim, Sun-I
Lim, Su-yeong
Kim, Taehyo
Kwon, Se-Hun
Lee, Duck Hyun
author_facet Bak, Su-Jeong
Kim, Sun-I
Lim, Su-yeong
Kim, Taehyo
Kwon, Se-Hun
Lee, Duck Hyun
author_sort Bak, Su-Jeong
collection PubMed
description We demonstrated highly efficient oxygen reduction catalysts composed of uniform Pt nanoparticles on small, reduced graphene oxides (srGO). The reduced graphene oxide (rGO) size was controlled by applying ultrasonication, and the resultant srGO enabled the morphological control of the Pt nanoparticles. The prepared catalysts provided efficient surface reactions and exhibited large surface areas and high metal dispersions. The resulting Pt/srGO samples exhibited excellent oxygen reduction performance and high stability over 1000 cycles of accelerated durability tests, especially the sample treated with 2 h of sonication. Detailed investigations of the structural and electrochemical properties of the resulting catalysts suggested that both the chemical functionality and electrical conductivity of these samples greatly influence their enhanced oxygen reduction efficiency.
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spelling pubmed-86255792021-11-27 Small Reduced Graphene Oxides for Highly Efficient Oxygen Reduction Catalysts Bak, Su-Jeong Kim, Sun-I Lim, Su-yeong Kim, Taehyo Kwon, Se-Hun Lee, Duck Hyun Int J Mol Sci Article We demonstrated highly efficient oxygen reduction catalysts composed of uniform Pt nanoparticles on small, reduced graphene oxides (srGO). The reduced graphene oxide (rGO) size was controlled by applying ultrasonication, and the resultant srGO enabled the morphological control of the Pt nanoparticles. The prepared catalysts provided efficient surface reactions and exhibited large surface areas and high metal dispersions. The resulting Pt/srGO samples exhibited excellent oxygen reduction performance and high stability over 1000 cycles of accelerated durability tests, especially the sample treated with 2 h of sonication. Detailed investigations of the structural and electrochemical properties of the resulting catalysts suggested that both the chemical functionality and electrical conductivity of these samples greatly influence their enhanced oxygen reduction efficiency. MDPI 2021-11-14 /pmc/articles/PMC8625579/ /pubmed/34830182 http://dx.doi.org/10.3390/ijms222212300 Text en © 2021 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Bak, Su-Jeong
Kim, Sun-I
Lim, Su-yeong
Kim, Taehyo
Kwon, Se-Hun
Lee, Duck Hyun
Small Reduced Graphene Oxides for Highly Efficient Oxygen Reduction Catalysts
title Small Reduced Graphene Oxides for Highly Efficient Oxygen Reduction Catalysts
title_full Small Reduced Graphene Oxides for Highly Efficient Oxygen Reduction Catalysts
title_fullStr Small Reduced Graphene Oxides for Highly Efficient Oxygen Reduction Catalysts
title_full_unstemmed Small Reduced Graphene Oxides for Highly Efficient Oxygen Reduction Catalysts
title_short Small Reduced Graphene Oxides for Highly Efficient Oxygen Reduction Catalysts
title_sort small reduced graphene oxides for highly efficient oxygen reduction catalysts
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8625579/
https://www.ncbi.nlm.nih.gov/pubmed/34830182
http://dx.doi.org/10.3390/ijms222212300
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