Bifunctional Pt-Ir nanoparticle catalysts for oxygen reduction and evolution reactions: investigating the influence of surface composition on the catalytic properties

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dc.contributor.affiliation Instituto Universitario de Investigación de Tecnología de los Materiales de la UPV
dc.contributor.authorBlanco Redondo, Lucindaes_ES
dc.contributor.authorLobko, Yevheniiaes_ES
dc.contributor.authorVeltruská, Katerinaes_ES
dc.contributor.authorNováková, Jaroslavaes_ES
dc.contributor.authorMazur, Michales_ES
dc.contributor.authorDarabut, Alina Madalina
dc.contributor.authorHrbek, Tomáses_ES
dc.contributor.authorDopita, Milanes_ES
dc.contributor.authorHranícek, Jakubes_ES
dc.contributor.authorYakovlev, Yuriies_ES
dc.contributor.authorMatolínová, Ivaes_ES
dc.contributor.authorMatolín, Vladimíres_ES
dc.contributor.funderCharles University in Praguees_ES
dc.contributor.funderGrant Agency of the Czech Republices_ES
dc.contributor.funderMinistry of Education, Youth and Sport of the Czech Republices_ES
dc.date.accessioned2026-01-14T13:34:40Z
dc.date.available2026-01-14T13:34:40Z
dc.date.issued2024-02-13es_ES
dc.description.abstract[EN] Unitized regenerative fuel cells (URFCs) can provide renewable, clean energy and hydrogen but require efficient bifunctional catalysts for oxygen reduction (ORR) and evolution reactions (OER). In this study, we present iridium-decorated platinum nanoparticles with three different compositions, Ir10/Pt90, Ir20/Pt80, and Ir40/Pt60. The nanoparticles' morphology and chemical structure were analysed before and after electrochemical activation to determine the optimal composition of the catalyst with the highest efficiency towards ORR and OER. Ir40/Pt60 showed the highest mass activity towards OER of 571.4 mA mgIr-1 at 1.525 VRHE, which was 1.5 times higher compared to commercial Ir black with 371.1 mA mgIr-1. In addition, the mass activity for ORR exhibited a positive correlation with the total of surface Pt active sites but decreased with the coverage of Pt nanoparticles by decorating Ir nanoparticles. Among the studied bimetallic nanoparticles, Ir20/Pt80 exhibited the highest efficiency at 57.7% and was considered the most promising URFC catalyst.en_EN
dc.description.accrualMethodSes_ES
dc.description.bibliographicCitationBlanco Redondo, L.; Lobko, Y.; Veltruská, K.; Nováková, J.; Mazur, M.; Darabut, Alina Madalina; Hrbek, T.... (2024). Bifunctional Pt-Ir nanoparticle catalysts for oxygen reduction and evolution reactions: investigating the influence of surface composition on the catalytic properties. Sustainable Energy & Fuels. 8(4):797-810. https://doi.org/10.1039/d3se01238ges_ES
dc.description.issue4es_ES
dc.description.sponsorshipThe authors acknowledge financial support from grant no. 22-03643S of the Czech Science Foundation, OP VVV project "PaC NG", No. CZ.02.1.01/0.0/0.0/16_025/0007414 of the Ministry of Education, Youth and Sports of the Czech Republic, and grant No. START/SCI/153 of the Charles University. M.M. would like to acknowledge the OP VVV "Excellent Research Teams", project No. CZ.02.1.01/0.0/0.0/15_003/0000417 - CUCAM.es_ES
dc.description.upvformatpfin810es_ES
dc.description.upvformatpinicio797es_ES
dc.description.volume8es_ES
dc.identifier.doi10.1039/d3se01238ges_ES
dc.identifier.eissn2398-4902es_ES
dc.identifier.urihttps://riunet.upv.es/handle/10251/231662
dc.languageIngléses_ES
dc.publisherRoyal Society of Chemistryes_ES
dc.relation.ispartofSustainable Energy & Fuelses_ES
dc.relation.pasarelaS\570669es_ES
dc.relation.projectIDinfo:eu-repo/grantAgreement/MEYS// CZ.02.1.01%2F0.0%2F0.0%2F16_025%2F0007414//Fuel Cells with Low Platinum Content/es_ES
dc.relation.projectIDinfo:eu-repo/grantAgreement/MEYS//CZ.02.1.01%2F 0.0%2F0.0%2F15_003%2F0000417/es_ES
dc.relation.projectIDinfo:eu-repo/grantAgreement/GACR//22-03643S/es_ES
dc.relation.projectIDinfo:eu-repo/grantAgreement/CU//START%2FSCI%2F153/es_ES
dc.relation.publisherversionhttps://doi.org/10.1039/d3se01238ges_ES
dc.rightsReserva de todos los derechoses_ES
dc.rights.accessRightsCerradoes_ES
dc.subjectUnitized regenerative fuel cellses_ES
dc.subjectBifunctional catalystses_ES
dc.subjectOxygen reduction reactiones_ES
dc.subjectOxygen evolution reactiones_ES
dc.subjectIridium platinum nanoparticleses_ES
dc.subjectElectrocatalytic activityes_ES
dc.titleBifunctional Pt-Ir nanoparticle catalysts for oxygen reduction and evolution reactions: investigating the influence of surface composition on the catalytic propertieses_ES
dc.typeArtículoes_ES
dc.type.versioninfo:eu-repo/semantics/publishedVersiones_ES
dspace.entity.typePublicationes_ES
person.identifier476642
person.identifier.orcid0000-0002-1595-6094
relation.isAuthorOfPublication8a1de2b0-41dd-4221-b588-afbc1b3a3408
relation.isAuthorOfPublication.latestForDiscovery8a1de2b0-41dd-4221-b588-afbc1b3a3408
relation.isOrgUnitOfPublication08962744-756a-4f9c-935e-fae62360b44d
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upv.uuid07340f4b-ae79-4858-baae-8b178eb7c047es_ES

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