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N-doped graphene foam obtained by microwave-assisted exfoliation of graphite
The synthesis of metal-free but electrochemically active electrode materials, which could be an important contributor to environmental protection, is the key motivation for this research approach. The progress of graphene material science in recent decades has contributed to the further development...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Nature Publishing Group UK
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7820460/ https://www.ncbi.nlm.nih.gov/pubmed/33479478 http://dx.doi.org/10.1038/s41598-021-81769-5 |
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author | Skorupska, Malgorzata Ilnicka, Anna Lukaszewicz, Jerzy P. |
author_facet | Skorupska, Malgorzata Ilnicka, Anna Lukaszewicz, Jerzy P. |
author_sort | Skorupska, Malgorzata |
collection | PubMed |
description | The synthesis of metal-free but electrochemically active electrode materials, which could be an important contributor to environmental protection, is the key motivation for this research approach. The progress of graphene material science in recent decades has contributed to the further development of nanotechnology and material engineering. Due to the unique properties of graphene materials, they have found many practical applications: among others, as catalysts in metal-air batteries, supercapacitors, or fuel cells. In order to create an economical and efficient material for energy production and storage applications, researchers focused on the introduction of additional heteroatoms to the graphene structure. As solutions for functionalizing pristine graphene structures are very difficult to implement, this article presents a facile method of preparing nitrogen-doped graphene foam in a microwave reactor. The influence of solvent type and microwave reactor holding time was investigated. To characterize the elemental content and structural properties of the obtained N-doped graphene materials, methods such as elemental analysis, high-resolution transmission electron microscopy, scanning electron microscopy, and Raman spectroscopy were used. Electrochemical activity in ORR of the obtained materials was tested using cyclic voltamperometry (CV) and linear sweep voltamperometry (LSV). The tests proved the materials’ high activity towards ORR, with the number of electrons reaching 3.46 for tested non-Pt materials, while the analogous value for the C-Pt (20 wt% loading) reference was 4. |
format | Online Article Text |
id | pubmed-7820460 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-78204602021-01-26 N-doped graphene foam obtained by microwave-assisted exfoliation of graphite Skorupska, Malgorzata Ilnicka, Anna Lukaszewicz, Jerzy P. Sci Rep Article The synthesis of metal-free but electrochemically active electrode materials, which could be an important contributor to environmental protection, is the key motivation for this research approach. The progress of graphene material science in recent decades has contributed to the further development of nanotechnology and material engineering. Due to the unique properties of graphene materials, they have found many practical applications: among others, as catalysts in metal-air batteries, supercapacitors, or fuel cells. In order to create an economical and efficient material for energy production and storage applications, researchers focused on the introduction of additional heteroatoms to the graphene structure. As solutions for functionalizing pristine graphene structures are very difficult to implement, this article presents a facile method of preparing nitrogen-doped graphene foam in a microwave reactor. The influence of solvent type and microwave reactor holding time was investigated. To characterize the elemental content and structural properties of the obtained N-doped graphene materials, methods such as elemental analysis, high-resolution transmission electron microscopy, scanning electron microscopy, and Raman spectroscopy were used. Electrochemical activity in ORR of the obtained materials was tested using cyclic voltamperometry (CV) and linear sweep voltamperometry (LSV). The tests proved the materials’ high activity towards ORR, with the number of electrons reaching 3.46 for tested non-Pt materials, while the analogous value for the C-Pt (20 wt% loading) reference was 4. Nature Publishing Group UK 2021-01-21 /pmc/articles/PMC7820460/ /pubmed/33479478 http://dx.doi.org/10.1038/s41598-021-81769-5 Text en © The Author(s) 2021 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Skorupska, Malgorzata Ilnicka, Anna Lukaszewicz, Jerzy P. N-doped graphene foam obtained by microwave-assisted exfoliation of graphite |
title | N-doped graphene foam obtained by microwave-assisted exfoliation of graphite |
title_full | N-doped graphene foam obtained by microwave-assisted exfoliation of graphite |
title_fullStr | N-doped graphene foam obtained by microwave-assisted exfoliation of graphite |
title_full_unstemmed | N-doped graphene foam obtained by microwave-assisted exfoliation of graphite |
title_short | N-doped graphene foam obtained by microwave-assisted exfoliation of graphite |
title_sort | n-doped graphene foam obtained by microwave-assisted exfoliation of graphite |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7820460/ https://www.ncbi.nlm.nih.gov/pubmed/33479478 http://dx.doi.org/10.1038/s41598-021-81769-5 |
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