α-Fe2O3/, Co3O4/, and CoFe2O4/MWCNTs/Ionic Liquid Nanocomposites as High-Performance Electrocatalysts for the Electrocatalytic Hydrogen Evolution Reaction in a Neutral Medium

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dc.contributor.authorIbarra, José
dc.contributor.authorAguirre, María Jesus
dc.contributor.authordel Río, Rodrigo
dc.contributor.authorHenriquez, Rodrigo
dc.contributor.authorFaccio, Ricardo
dc.contributor.authorDalchiele, Enrique A.
dc.contributor.authorArce, Roxana
dc.contributor.authorRamírez, Galo
dc.date.accessioned2024-08-10T14:45:29Z
dc.date.available2024-08-10T13:57:17Z
dc.date.available2024-08-10T14:45:29Z
dc.date.issued2024
dc.descriptionIndexación: Scopus.
dc.description.abstractTransition metal oxides are a great alternative to less expensive hydrogen evolution reaction (HER) catalysts. However, the lack of conductivity of these materials requires a conductor material to support them and improve the activity toward HER. On the other hand, carbon paste electrodes result in a versatile and cheap electrode with good activity and conductivity in electrocatalytic hydrogen production, especially when the carbonaceous material is agglomerated with ionic liquids. In the present work, an electrode composed of multi-walled carbon nanotubes (MWCNTs) and cobalt ferrite oxide (CoFe2O4) was prepared. These compounds were included on an electrode agglomerated with the ionic liquid N-octylpyridinium hexafluorophosphate (IL) to obtain the modified CoFe2O4/MWCNTs/IL nanocomposite electrode. To evaluate the behavior of each metal of the bimetallic oxide, this compound was compared to the behavior of MWCNTs/IL where a single monometallic iron or cobalt oxides were included (i.e., α-Fe2O3/MWCNTs/IL and Co3O4/MWCNTs/IL). The synthesis of the oxides has been characterized by X-ray diffraction (XRD), RAMAN spectroscopy, and field emission scanning electronic microscopy (FE-SEM), corroborating the nanometric character and the structure of the compounds. The CoFe2O4/MWCNTs/IL nanocomposite system presents excellent electrocatalytic activity toward HER with an onset potential of −270 mV vs. RHE, evidencing an increase in activity compared to monometallic oxides and exhibiting onset potentials of −530 mV and −540 mV for α-Fe2O3/MWCNTs/IL and Co3O4/MWCNTs/IL, respectively. Finally, the system studied presents excellent stability during the 5 h of electrolysis, producing 132 μmol cm−2 h−1 of hydrogen gas.
dc.description.urihttps://www-scopus-com.recursosbiblioteca.unab.cl/record/display.uri?eid=2-s2.0-85198411114&origin=resultslist&sort=plf-f&src=s&sid=2b093faffe4d5aff6ff7374a93494d93&sot=aff&sdt=cl&cluster=scofreetoread%2C%22all%22%2Ct%2Bscoexactkeywords%2C%22Article%22%2Ct%2Bscosubjabbr%2C%22CHEM%22%2Ct&s=AF-ID%2860002636%29+AND+SUBJAREA%28CHEM%29&sl=34&sessionSearchId=2b093faffe4d5aff6ff7374a93494d93&relpos=1
dc.identifier.citationInternational Journal of Molecular Sciences Open Access Volume 25, Issue 13 July 2024 Article number 7043
dc.identifier.doi10.3390/ijms25137043
dc.identifier.issn16616596
dc.identifier.urihttps://repositorio.unab.cl/handle/ria/59159.2
dc.language.isoen
dc.publisherMultidisciplinary Digital Publishing Institute (MDPI)
dc.rights.licenseCC BY 4.0 Attribution 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subjectcobalt ferrite/carbon nanotubes/ionic liquid electrode
dc.subjectH2 generation
dc.subjectHER catalysis
dc.subjectmetal oxide/carbon nanotubes/ionic liquid electrode
dc.titleα-Fe2O3/, Co3O4/, and CoFe2O4/MWCNTs/Ionic Liquid Nanocomposites as High-Performance Electrocatalysts for the Electrocatalytic Hydrogen Evolution Reaction in a Neutral Medium
dc.typeArtículo
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α-Fe2O3/, Co3O4/, and CoFe2O4/MWCNTs/Ionic Liquid Nanocomposites as High-Performance Electrocatalysts for the Electrocatalytic Hydrogen Evolution Reaction in a Neutral Medium
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