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Biomass-derived nanoporous carbons as electrocatalysts for oxygen reduction reaction

2020-11-01Journal article Restricted access
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dc.contributor.authorFernandes, Diana M
dc.contributor.authorMestre, Ana S.
dc.contributor.authorMartins, Angela
dc.contributor.authorNunes, Nelson
dc.contributor.authorCarvalho, A. P.
dc.contributor.authorFreire, Cristina
dc.date.accessioned2020-11-24T15:26:47Z
dc.date.available2020-11-24T15:26:47Z
dc.date.issued2020-11-01
dc.description.abstractElectrocatalysts (ECs) for the oxygen reduction reaction (ORR) are crucial in fuel cells and for this reason developing cost-effective metal-free ECs with high electrocatalytic activity and high-volume production remains a huge challenge. Herein, we report the application as ORR electrocatalysts of a series of high grade nanoporous carbons, prepared by chemical activation of acid-chars obtained from the H2SO4 digestion and polycondensation (acid-mediated carbonization) of a biomass residue (Agave sisalana). All the nanoporous carbons presented good ORR electrocatalytic activities in alkaline medium. The AC(1) carbon exhibited the most promising ORR performance with E-onset = 0.84 vs. RHE, j(L, 0.26 V, 1600 rpm) = -3.12 mA cm(-2) and n(O2) = 3.6 electrons. The Tafel slopes of all carbons varied between 47 mV dec(-1) (AC(3)) and 250 mV dec(-1) (AC(1)). Furthermore, the carbons revealed superior tolerance to methanol when compared with commercial Pt/C and a competitive long-term electrochemical stability, with current retentions of 75-85 % after 20,000 s. The results obtained in this work suggest a promising method based on sustainable and economical biomass residues towards the development and engineering of novel value-added biomass-derived carbons as effective metal-free electrocatalysts for alkaline fuel cells.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationFERNANDES, Diana M.; [et al] – Biomass-derived nanoporous carbons as electrocatalysts for oxygen reduction reaction. Catalysis Today. ISSN 0920-5861. Vol. 357, SI, (2020), pp. 269-278pt_PT
dc.identifier.doi10.1016/j.cattod.2019.02.048pt_PT
dc.identifier.issn0920-5861
dc.identifier.issn1873-4308
dc.identifier.urihttp://hdl.handle.net/10400.21/12396
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relationUID/MULTI/00612/2019 - CQBpt_PT
dc.relationPOCI/01/0145/FEDER/007265 - REQUIMTEpt_PT
dc.relationWASTE-DERIVED CARBON COMPOSITES AS PHOTOCATALYSTS FOR ADVANCED WATER PURIFICATION
dc.relation.publisherversionhttps://reader.elsevier.com/reader/sd/pii/S0920586118313737?token=E3E6687A5870B16B3E026AA74F318FF842BDE80EC152EDC58366CADC06CC8D00ECBDBEBBD794CD7C6AFAC1A0A32158B9pt_PT
dc.subjectAgave sisalanapt_PT
dc.subjectAcid-charpt_PT
dc.subjectChemical activationpt_PT
dc.subjectOxygen reduction reactionpt_PT
dc.subjectElectrocatalysispt_PT
dc.subjectFuel cellspt_PT
dc.titleBiomass-derived nanoporous carbons as electrocatalysts for oxygen reduction reactionpt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleWASTE-DERIVED CARBON COMPOSITES AS PHOTOCATALYSTS FOR ADVANCED WATER PURIFICATION
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FQUI%2F50006%2F2013/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBPD%2F86693%2F2012/PT
oaire.citation.endPage278pt_PT
oaire.citation.startPage269pt_PT
oaire.citation.titleCatalysis Todaypt_PT
oaire.citation.volume357pt_PT
oaire.fundingStream5876
person.familyNameFernandes
person.familyNameMestre
person.familyNameMartins
person.familyNameNunes
person.familyNameCarvalho
person.familyNameMoreira Freire
person.givenNameDiana M
person.givenNameAna
person.givenNameAngela
person.givenNameNelson
person.givenNameAna
person.givenNameAna Cristina
person.identifierR-000-47T
person.identifier1344292
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person.identifier.orcid0000-0001-5263-2737
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person.identifier.orcid0000-0003-1637-478X
person.identifier.orcid0000-0003-4499-0379
person.identifier.orcid0000-0002-3144-2800
person.identifier.orcid0000-0003-1753-8678
person.identifier.ridD-6280-2013
person.identifier.ridC-5010-2008
person.identifier.ridB-1775-2012
person.identifier.ridA-8516-2012
person.identifier.scopus-author-id23767117900
person.identifier.scopus-author-id6602567104
person.identifier.scopus-author-id7203013509
person.identifier.scopus-author-id11540776800
person.identifier.scopus-author-id55611516400
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
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