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3D nickel foams with controlled morphologies for hydrogen evolution reaction in highly alkaline media

2019-01-15Journal article Restricted access
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dc.contributor.authorSiwek, K. I.
dc.contributor.authorEugénio, S.
dc.contributor.authorSantos, Diogo
dc.contributor.authorMoura E Silva, Teresa
dc.contributor.authorMONTEMOR, FATIMA
dc.date.accessioned2019-02-08T12:03:07Z
dc.date.available2019-02-08T12:03:07Z
dc.date.issued2019-01-15
dc.description.abstractWater electrolysis is the cleanest method for hydrogen production, and can be 100% green when renewable energy is used as electricity source. When the hydrogen evolution reaction (HER) is carried out in alkaline media, nickel (Ni) is a low cost catalyst and an interesting alternative to platinum. Still, its performance has to be enhanced to meet the high efficiency of the nobler metals, an objective that requires further tailoring of the surface area and morphology of Ni-based electrode materials. Unlike commercially available porous Ni, these features can be easily controlled via electrodeposition, a one-step process, taking advantage of the dynamic hydrogen bubble template (DHBT). Generally, changes in surface porosity and morphology have been mainly achieved by altering the main parameters, such as the current density or the deposition time. However, very scarce work has been done on the role of supporting electrolyte (i.e., its concentration and composition) in tailoring the foam features and consequently their catalytic activity. Hence, this approach paves the way to optimum design of metallic foam structures that can be obtained only with modifications in the electrolytic bath. In this work, 3D Ni foams are obtained from different composition baths by galvanostatic electrodeposition in the hydrogen evolution regime on stainless steel current collectors. Their porosity and morphology are analysed by optical microscopy and SEM. The electrochemical performance is evaluated by cyclic voltammetry, while catalytic activity towards HER and materials' stability in 8 M KOH are tested using polarisation curves and chronoamperometry measurements, respectively. The recorded high currents and extended stability of the Ni foams with dendritic morphology demonstrate its outstanding performance, making it an attractive cathode material for HER in highly alkaline media. (C) 2018 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationSIWEK, K. I.; [et al] – 3D nickel foams with controlled morphologies for hydrogen evolution reaction in highly alkaline media. International Journal of Hydrogen Energy. ISSN 0360-3199. Vol., 44, N.º 3 (2019), pp. 1701-1709pt_PT
dc.identifier.doi10.1016/j.ijhydene.2018.11.070pt_PT
dc.identifier.issn0360-3199
dc.identifier.issn1879-3487
dc.identifier.urihttp://hdl.handle.net/10400.21/9472
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relationIF/01084/2014/CP1214/CT0003 - FCTpt_PT
dc.relationSFRH/BD/123963/2016 - FCTpt_PT
dc.subject3D nickel foamspt_PT
dc.subjectElectrodepositionpt_PT
dc.subjectMorphologypt_PT
dc.subjectHydrogen evolution reactionpt_PT
dc.title3D nickel foams with controlled morphologies for hydrogen evolution reaction in highly alkaline mediapt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/PEst-OE%2FQUI%2FUI0100%2F2013/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/3599-PPCDT/M-ERA-NET%2F0004%2F2014/PT
oaire.citation.endPage1709pt_PT
oaire.citation.issue3pt_PT
oaire.citation.startPage1701pt_PT
oaire.citation.titleInternational Journal of Hydrogen Energypt_PT
oaire.citation.volume44pt_PT
oaire.fundingStream3599-PPCDT
oaire.fundingStream3599-PPCDT
person.familyNameSantos
person.familyNameMoura e Silva
person.familyNameMONTEMOR
person.givenNameDiogo
person.givenNameTeresa
person.givenNameFATIMA
person.identifier78443
person.identifier572597
person.identifier.ciencia-id7C11-8271-6358
person.identifier.ciencia-id2D17-B93D-44BC
person.identifier.ciencia-id3C16-79AA-7E94
person.identifier.orcid0000-0002-7920-2638
person.identifier.orcid0000-0001-8402-6600
person.identifier.orcid0000-0001-7835-6814
person.identifier.ridF-8778-2014
person.identifier.scopus-author-id14030272100
person.identifier.scopus-author-id6506601258
person.identifier.scopus-author-id7004347821
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication7dcea554-3be8-45b1-9854-0bb8334b070f
relation.isAuthorOfPublicationfe43fd19-4bc4-4486-a11f-534f08bc1212
relation.isAuthorOfPublication221aa2b5-1f6f-44c6-ae85-f227362e800b
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