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Nafion phosphonic acid composite membranes for proton exchange membranes fuel cells

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dc.contributor.authorTeixeira, Fatima
dc.contributor.authorSá, A.I. De
dc.contributor.authorTeixeira, António P. S.
dc.contributor.authorRangel, C. M.
dc.date.accessioned2020-03-17T10:10:31Z
dc.date.available2020-03-17T10:10:31Z
dc.date.issued2019
dc.description.abstractABSTRACT: In this work, new doped Nafion membranes with enhanced proton conductivity were prepared to be used as proton exchange membranes in fuel cells. New dopants derived from arylmono-or bisphosphonic acid were prepared and incorporated into the new membranes using impregnation or casting methods. Proton conductivities were assessed by Electrochemical Impedance Spectroscopy (EIS), at different temperatures and relative humidity (RH) conditions, in order to evaluate the influence of the structure and the method of the preparation on proton transport. The membranes prepared by casting showed higher proton conductivities than commercial Nafion membrane at all temperatures and relative humidity conditions studied. The [1,4-phenylenebis-(hydroxymethanetriyl)] tetrakis(phosphonic acid) (BP2) showed the best proton conductivity with a value of 87 mS cm(-1). The values obtained for the activation energy (Ea) for proton conduction suggests that transport occurs via both Grotthuss and vehicular mechanisms.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationTeixeira, Fátima C... [et.al.] - Nafion phosphonic acid composite membranes for proton exchange membranes fuel cells. In: Applied Surface Science, 2019, Vol. 487, p. 889-897pt_PT
dc.identifier.doi10.1016/j.apsusc.2019.05.078pt_PT
dc.identifier.issn0169-4332
dc.identifier.urihttp://hdl.handle.net/10400.9/3185
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relationProject "PEMFC-SUDOE" - SOE1/P1/E0293pt_PT
dc.relation.publisherversionhttps://doi.org/10.1016/j.apsusc.2019.05.078pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectFuel cellspt_PT
dc.subjectPolymer electrolyte membranept_PT
dc.subjectProton exchange membranept_PT
dc.titleNafion phosphonic acid composite membranes for proton exchange membranes fuel cellspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage897pt_PT
oaire.citation.startPage889pt_PT
oaire.citation.titleApplied Surface Sciencept_PT
oaire.citation.volume487pt_PT
person.familyNameTeixeira
person.familyNameSá
person.familyNameTeixeira
person.familyNameRangel
person.givenNameFatima
person.givenNameAna
person.givenNameAntónio Paulo Silva
person.givenNameCarmen M.
person.identifier.ciencia-idC014-509B-D1DC
person.identifier.ciencia-idB615-CCF2-424E
person.identifier.ciencia-idAA13-FF7C-9E29
person.identifier.orcid0000-0003-0801-2068
person.identifier.orcid0000-0003-1267-7994
person.identifier.orcid0000-0001-7448-0893
person.identifier.orcid0000-0001-7996-8142
person.identifier.ridN-5456-2014
person.identifier.ridD-5477-2011
person.identifier.scopus-author-id7102746385
person.identifier.scopus-author-id36856362300
person.identifier.scopus-author-id7006108156
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication3daa40f1-7bb6-488d-83d9-04a61c655d67
relation.isAuthorOfPublication5d35b81a-2f1b-4051-b8bc-d1a4b0934a01
relation.isAuthorOfPublicationd8ff15d1-5d27-4e57-8654-f0f85fd79510
relation.isAuthorOfPublication804e595a-d539-46a2-ae78-6cadc8ca9457
relation.isAuthorOfPublication.latestForDiscovery5d35b81a-2f1b-4051-b8bc-d1a4b0934a01

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