N-doped graphene foam obtained by microwave-assisted exfoliation of graphite

Abstract 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 dev...

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Autores principales:	Malgorzata Skorupska, Anna Ilnicka, Jerzy P. Lukaszewicz
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/1b1ae2d789f441ca9f2707ebadf5c997
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spelling	oai:doaj.org-article:1b1ae2d789f441ca9f2707ebadf5c9972021-12-02T10:49:16ZN-doped graphene foam obtained by microwave-assisted exfoliation of graphite10.1038/s41598-021-81769-52045-2322https://doaj.org/article/1b1ae2d789f441ca9f2707ebadf5c9972021-01-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-81769-5https://doaj.org/toc/2045-2322Abstract 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.Malgorzata SkorupskaAnna IlnickaJerzy P. LukaszewiczNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Malgorzata Skorupska Anna Ilnicka Jerzy P. Lukaszewicz N-doped graphene foam obtained by microwave-assisted exfoliation of graphite
description	Abstract 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	article
author	Malgorzata Skorupska Anna Ilnicka Jerzy P. Lukaszewicz
author_facet	Malgorzata Skorupska Anna Ilnicka Jerzy P. Lukaszewicz
author_sort	Malgorzata Skorupska
title	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_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_sort	n-doped graphene foam obtained by microwave-assisted exfoliation of graphite
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/1b1ae2d789f441ca9f2707ebadf5c997
work_keys_str_mv	AT malgorzataskorupska ndopedgraphenefoamobtainedbymicrowaveassistedexfoliationofgraphite AT annailnicka ndopedgraphenefoamobtainedbymicrowaveassistedexfoliationofgraphite AT jerzyplukaszewicz ndopedgraphenefoamobtainedbymicrowaveassistedexfoliationofgraphite
_version_	1718396573786832896

N-doped graphene foam obtained by microwave-assisted exfoliation of graphite

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