Repository logo
 
Publication

TiO2-reduced graphene oxide-Pt nanocomposites for the photogeneration of hydrogen from ethanol liquid and gas phases

2021-11Journal article Open access
Simple item page
dc.contributor.authorEsteves, M. Alexandra
dc.contributor.authorFresno, Fernando
dc.contributor.authorFernandes, Vitor
dc.contributor.authorOropeza, Freddy E.
dc.contributor.authorO'Shea, Victor A. de la Peña
dc.contributor.authorRangel, C. M.
dc.date.accessioned2022-01-06T14:47:15Z
dc.date.available2022-01-06T14:47:15Z
dc.date.issued2021-11
dc.description.abstractABSTRACT: The production of hydrogen by photocatalysis presents attractive features but also stringent requirements of materials properties. A series of TiO2-based photocatalysts containing reduced graphene oxide (rGO) and plat-inum, TiO2-rGO(x)-Pt(y) (x=0-5 wt%; y=1.5, 2.5, 3.8 wt%), were synthesized by a simple two-step procedure. The ternary composites exhibited promising performance for hydrogen generation, in both liquid and gas phase photocatalysis, using ethanol as hole scavenger, under UV light. The effect of the concentration of ethanol, graphene oxide, and Pt, as well as photocatalyst loading and solution pH were assessed. The photocatalyst TiO2-rGO3%-Pt3.8%, in the liquid phase, produced gases containing over 95% hydrogen at very high initial pro-duction rates, similar to 560 mmolh(-1)g(cat)(-1). The gas production vs irradiation time (6 h) showed linear dependence in a two-slope graph, with a drastic decrease of the rate due to Pt poisoning. Solution pH reached values of 3.5, regardless of the initial value. In the liquid phase, partial oxidation of ethanol took place with the dehydroge-nation of ethanol to acetaldehyde. In the gas phase photocatalysis, TiO2-rGO3%-Pt3.8% showed capability for photo-reforming as indicated by produced gases with a molar ratio H-2/CO2 of 3. rGO reinforces the effect of Pt as a suppressor of charge recombination.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationEsteves, Maria A... [et.al.] - TiO2-reduced graphene oxide-Pt nanocomposites for the photogeneration of hydrogen from ethanol liquid and gas phases. In: Catalysis Today, 2021, Vol. 380, p. 41-52pt_PT
dc.identifier.doi10.1016/j.cattod.2021.05.012pt_PT
dc.identifier.eissn1873-4308
dc.identifier.issn0920-5861
dc.identifier.urihttp://hdl.handle.net/10400.9/3676
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherElsevierpt_PT
dc.relationPEMFC-SUDOE - SOE1/P1/E0293SOE1/P1/E0293pt_PT
dc.relationHYLANTIC - EAPA_204/2016pt_PT
dc.relationSolar Facilities for the European Research Area - Third Phase
dc.relationNyMPHA (PID2019-106315RB-I00)pt_PT
dc.relationSOLPAC (ENE201789170-R)pt_PT
dc.relationFotoArt-CM project (S2018/NMT-4367)pt_PT
dc.relation.publisherversionhttps://doi.org/10.1016/j.cattod.2021.05.012pt_PT
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/pt_PT
dc.subjectHydrogenpt_PT
dc.subjectPhotocatalyticpt_PT
dc.subjectTiO2 nanoparticlespt_PT
dc.subjectNanocompositespt_PT
dc.subjectPlatinumpt_PT
dc.titleTiO2-reduced graphene oxide-Pt nanocomposites for the photogeneration of hydrogen from ethanol liquid and gas phasespt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleSolar Facilities for the European Research Area - Third Phase
oaire.awardURIinfo:eu-repo/grantAgreement/EC/H2020/823802/EU
oaire.citation.endPage52pt_PT
oaire.citation.startPage41pt_PT
oaire.citation.titleCatalysis Todaypt_PT
oaire.citation.volume380pt_PT
oaire.fundingStreamH2020
person.familyNameEsteves
person.familyNameFernandes
person.familyNameRangel
person.givenNameM. Alexandra
person.givenNameVitor
person.givenNameCarmen M.
person.identifier.ciencia-id8D1A-97AE-F411
person.identifier.ciencia-idAA13-FF7C-9E29
person.identifier.orcid0000-0002-7010-605X
person.identifier.orcid0000-0002-3947-0275
person.identifier.orcid0000-0001-7996-8142
person.identifier.ridH-2971-2017
person.identifier.ridD-5477-2011
person.identifier.scopus-author-id35581297200
person.identifier.scopus-author-id23970056400
person.identifier.scopus-author-id7006108156
project.funder.identifierhttp://doi.org/10.13039/501100008530
project.funder.nameEuropean Commission
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication341c4414-3fe7-4a05-99d5-8577bfdd05c8
relation.isAuthorOfPublicationcb2b5b48-8c88-4f34-ac87-c5f2558ec151
relation.isAuthorOfPublication804e595a-d539-46a2-ae78-6cadc8ca9457
relation.isAuthorOfPublication.latestForDiscovery804e595a-d539-46a2-ae78-6cadc8ca9457
relation.isProjectOfPublicatione8d1d421-bea2-4b79-a56d-dc3ed7c519d0
relation.isProjectOfPublication.latestForDiscoverye8d1d421-bea2-4b79-a56d-dc3ed7c519d0

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
CatalysisToday_Vol.380_41-52.pdf
Size:
1012.77 KB
Format:
Adobe Portable Document Format
Download

Collections

ME - Artigos em revistas internacionais