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Enhanced proton conductivity of Nafion-azolebisphosphonate membranes for PEM fuel cells

2019Journal article Open access
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dc.contributor.authorTeixeira, Fatima
dc.contributor.authorde Sá, A.I.
dc.contributor.authorTeixeira, António P. S.
dc.contributor.authorRangel, C. M.
dc.date.accessioned2020-03-24T15:53:23Z
dc.date.available2020-03-24T15:53:23Z
dc.date.issued2019
dc.description.abstractABSTRACT: Fuel cells are among the cleaner alternatives of sustainable energy technologies, where their proton exchange membranes continue to be a key component with many challenges and opportunities ahead. In this study, different indazole- and benzotriazolebisphosphonic acids were prepared and incorporated into new Nafion-doped membranes up to a 5 wt% loading. The new membranes were characterised, and their proton conductivities were evaluated using electrochemical impedance spectroscopy. Membranes with a 1 wt% loading showed better proton conductivities than Nafion N-115 at all temperature and under relative humidity conditions studied. In these conditions, the best value was observed for the membrane doped with [hydroxy(1H-indazol-3-yl)methanediyl]bis(phosphonic acid) (BP2), with a proton conductivity of 98 mS cm(-1). Activation energy (E-a) values suggests that both Grotthuss and vehicular mechanisms are involved in the proton conduction across the membrane.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationTeixeira, Fátima C... [et.al.] - Enhanced proton conductivity of Nafion-azolebisphosphonate membranes for PEM fuel cells. In: New Journal of Chemistry, 2019, Vol. 43, p. 15249-15257pt_PT
dc.identifier.doi10.1039/c9nj03405fpt_PT
dc.identifier.issn1144-0546
dc.identifier.urihttp://hdl.handle.net/10400.9/3199
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherRoyal Society of Chemistrypt_PT
dc.relationEuropean Union - SOE1/P1/E0293pt_PT
dc.relation.publisherversionhttps://doi.org/10.1039/c9nj03405fpt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectFuel cellspt_PT
dc.subjectPolymer electrolyte membranept_PT
dc.subjectPEMpt_PT
dc.subjectProton exchange membranept_PT
dc.titleEnhanced proton conductivity of Nafion-azolebisphosphonate membranes for PEM fuel cellspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage15257pt_PT
oaire.citation.startPage15249pt_PT
oaire.citation.titleNew Journal of Chemistrypt_PT
oaire.citation.volume43pt_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.latestForDiscovery3daa40f1-7bb6-488d-83d9-04a61c655d67

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