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Cu-integrated NiFe nanofoams synthesised by one-step dynamic hydrogen bubble template electrodeposition for enhanced hydrogen evolution in alkaline electrolysis

2026Artigo científico Acesso aberto
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datacite.subject.fosEngenharia e Tecnologia::Engenharia Química
dc.contributor.authorCarvalho, Gabriel Garcia
dc.contributor.authorMoura e Silva, Teresa
dc.contributor.authorMontemor, Maria de Fátima
dc.contributor.authorMoura e Silva, Teresa
dc.contributor.editorRoyal Society of Chemistry (RSC)
dc.date.accessioned2026-10-09T08:53:23Z
dc.date.available2026-10-09T08:53:23Z
dc.date.issued2026
dc.description.abstractNanostructured foams (nanofoams) can be synthesised by one-step dynamic hydrogen bubble template (DHBT) electrodeposition as sustainable, high-performance, and competitive electrodes for the hydrogen evolution reaction (HER) in alkaline electrolysis (AEL). This work shows the progressive integration of 0.5 to 33% of Cu content in a NiFe (∼50/50) framework to produce tri-metallic NiFeCu nanofoams with improved HER activity. The electrochemical HER activity of the nanofoams was studied by linear sweep voltammetry (LSV), Tafel analysis and chronoamperometry (for longevity assessment). The morphology, composition, real surface area and crystalline structure of the nanofoams were characterised by scanning electron microscopy, energy dispersive spectroscopy, confocal laser scanning microscopy and X-ray diffraction. The NiFe nanofoam without Cu content exhibited overpotentials of −170 and −260 mV at −10 and −50 mA cm−2, respectively, while the Received 9th March 2026 Accepted 29th August 2026 DOI: 10.1039/d6ta02065h rsc.li/materials-a Introduction integration of Cu to produce the NiFeCu2.0 nanofoam resulted in improved overpotentials of −110 and −180 mV, respectively. After 60 h of continued chronoamperometric ageing, both the NiFe and NiFeCu2.0 electrodes exhibited robust longevity under harsh HER conditions, retaining 92% of the electrochemical activity when assessed by potentiodynamic LSV measurement, while the current during the chronoamperometry was approximately 60%. The difference between these two retention figures is thoroughly discussed in relation to resistive and mass-transport phenomena under the sustained hydrogen evolution.eng
dc.identifier.citationCarvalho, G. G., Moura e Silva, T., & Montemor, M. de F. (2026). Cu-integrated NiFe nanofoams synthesised by one-step dynamic hydrogen bubble template electrodeposition for enhanced hydrogen evolution in alkaline electrolysis. Journal of Materials Chemistry A. https://doi.org/10.1039/D6TA02065H
dc.identifier.doi10.1039/d6ta02065h
dc.identifier.eissn2050-7496
dc.identifier.urihttp://hdl.handle.net/10400.21/23216
dc.language.isoeng
dc.peerreviewedyes
dc.publisherRoyal Society of Chemistry
dc.relationUID/00100/2025; UID/PRR/00100/2025; LA/P/0056/2020
dc.relation.hasversionhttps://pubs.rsc.org/ta/article/doi/10.1039/d6ta02065h/1357568/Cu-integrated-NiFe-nanofoams-synthesised-by-one
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.subjectNiFe nanofoams
dc.subjectCopper integration (Cu)
dc.subjectHydrogen evolution reaction (HER)
dc.subjectAlkaline electrolysis
dc.subjectElectrodeposition
dc.subjectDynamic hydrogen bubble template
dc.titleCu-integrated NiFe nanofoams synthesised by one-step dynamic hydrogen bubble template electrodeposition for enhanced hydrogen evolution in alkaline electrolysiseng
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage41929
oaire.citation.startPage41916
oaire.citation.titleJournal of Materials Chemistry A
oaire.citation.volume14
oaire.versionhttp://purl.org/coar/version/c_970fb48d4fbd8a85
person.familyNameMoura e Silva
person.givenNameTeresa
person.identifier.ciencia-id2D17-B93D-44BC
person.identifier.orcid0000-0001-8402-6600
person.identifier.ridF-8778-2014
person.identifier.scopus-author-id6506601258
relation.isAuthorOfPublicationfe43fd19-4bc4-4486-a11f-534f08bc1212
relation.isAuthorOfPublication.latestForDiscoveryfe43fd19-4bc4-4486-a11f-534f08bc1212

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