Hybrids of Reduced Graphene Oxide Aerogel and CNT for Electrochemical O<sub>2</sub> Reduction

Carbon nanotubes (CNTs), graphene aerogels (GAs), and their hybrid (CNT-GA) prepared by hydrothermal treatment were tested in the electrocatalytic oxygen reduction reaction (ORR). The importance of porous structure derived from the combination of mesoporosity coming from CNTs with macroporosity stem...

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Autores principales:	Javier Hernández-Ferrer, Ana M. Benito, Wolfgang K. Maser, Enrique García-Bordejé
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	graphene aerogel carbon nanotubes nitrogen doping electrocatalysis oxygen reduction mesoporosity Chemical technology TP1-1185 Chemistry QD1-999
Acceso en línea:	https://doaj.org/article/14dceb3e07964c3bab9140f5b7d0b937
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spelling	oai:doaj.org-article:14dceb3e07964c3bab9140f5b7d0b9372021-11-25T17:06:51ZHybrids of Reduced Graphene Oxide Aerogel and CNT for Electrochemical O<sub>2</sub> Reduction10.3390/catal111114042073-4344https://doaj.org/article/14dceb3e07964c3bab9140f5b7d0b9372021-11-01T00:00:00Zhttps://www.mdpi.com/2073-4344/11/11/1404https://doaj.org/toc/2073-4344Carbon nanotubes (CNTs), graphene aerogels (GAs), and their hybrid (CNT-GA) prepared by hydrothermal treatment were tested in the electrocatalytic oxygen reduction reaction (ORR). The importance of porous structure derived from the combination of mesoporosity coming from CNTs with macroporosity stemming from GAs was evidenced because the hybrid carbon material exhibited synergistic performance in terms of kinetic current and onset potential. Different electrocatalysts were prepared based on these hybrids doped with nitrogen using different precursors and also supporting Fe nanoparticles. N-doped carbon hybrids showed higher electrocatalytic activity than their undoped counterparts. Nevertheless, both doped and undoped materials provided a mixed two and four electron reduction. On the other hand, the addition of a Fe precursor and phenanthroline to the CNT-GA allowed preparing an N-doped hybrid containing Fe nanoparticles which favored the 4-electron oxygen reduction to water, thus being an excellent candidate as a structured cathode in fuel cells.Javier Hernández-FerrerAna M. BenitoWolfgang K. MaserEnrique García-BordejéMDPI AGarticlegraphene aerogelcarbon nanotubesnitrogen dopingelectrocatalysisoxygen reductionmesoporosityChemical technologyTP1-1185ChemistryQD1-999ENCatalysts, Vol 11, Iss 1404, p 1404 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	graphene aerogel carbon nanotubes nitrogen doping electrocatalysis oxygen reduction mesoporosity Chemical technology TP1-1185 Chemistry QD1-999
spellingShingle	graphene aerogel carbon nanotubes nitrogen doping electrocatalysis oxygen reduction mesoporosity Chemical technology TP1-1185 Chemistry QD1-999 Javier Hernández-Ferrer Ana M. Benito Wolfgang K. Maser Enrique García-Bordejé Hybrids of Reduced Graphene Oxide Aerogel and CNT for Electrochemical O<sub>2</sub> Reduction
description	Carbon nanotubes (CNTs), graphene aerogels (GAs), and their hybrid (CNT-GA) prepared by hydrothermal treatment were tested in the electrocatalytic oxygen reduction reaction (ORR). The importance of porous structure derived from the combination of mesoporosity coming from CNTs with macroporosity stemming from GAs was evidenced because the hybrid carbon material exhibited synergistic performance in terms of kinetic current and onset potential. Different electrocatalysts were prepared based on these hybrids doped with nitrogen using different precursors and also supporting Fe nanoparticles. N-doped carbon hybrids showed higher electrocatalytic activity than their undoped counterparts. Nevertheless, both doped and undoped materials provided a mixed two and four electron reduction. On the other hand, the addition of a Fe precursor and phenanthroline to the CNT-GA allowed preparing an N-doped hybrid containing Fe nanoparticles which favored the 4-electron oxygen reduction to water, thus being an excellent candidate as a structured cathode in fuel cells.
format	article
author	Javier Hernández-Ferrer Ana M. Benito Wolfgang K. Maser Enrique García-Bordejé
author_facet	Javier Hernández-Ferrer Ana M. Benito Wolfgang K. Maser Enrique García-Bordejé
author_sort	Javier Hernández-Ferrer
title	Hybrids of Reduced Graphene Oxide Aerogel and CNT for Electrochemical O<sub>2</sub> Reduction
title_short	Hybrids of Reduced Graphene Oxide Aerogel and CNT for Electrochemical O<sub>2</sub> Reduction
title_full	Hybrids of Reduced Graphene Oxide Aerogel and CNT for Electrochemical O<sub>2</sub> Reduction
title_fullStr	Hybrids of Reduced Graphene Oxide Aerogel and CNT for Electrochemical O<sub>2</sub> Reduction
title_full_unstemmed	Hybrids of Reduced Graphene Oxide Aerogel and CNT for Electrochemical O<sub>2</sub> Reduction
title_sort	hybrids of reduced graphene oxide aerogel and cnt for electrochemical o<sub>2</sub> reduction
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/14dceb3e07964c3bab9140f5b7d0b937
work_keys_str_mv	AT javierhernandezferrer hybridsofreducedgrapheneoxideaerogelandcntforelectrochemicalosub2subreduction AT anambenito hybridsofreducedgrapheneoxideaerogelandcntforelectrochemicalosub2subreduction AT wolfgangkmaser hybridsofreducedgrapheneoxideaerogelandcntforelectrochemicalosub2subreduction AT enriquegarciabordeje hybridsofreducedgrapheneoxideaerogelandcntforelectrochemicalosub2subreduction
_version_	1718412697187385344

Hybrids of Reduced Graphene Oxide Aerogel and CNT for Electrochemical O<sub>2</sub> Reduction

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