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dc.contributor.authorTouni, Aikaterini
dc.contributor.authorLiu, Xin
dc.contributor.authorKang, Xiaolan
dc.contributor.authorAlmeida Carvalho, Patricia
dc.contributor.authorDiplas, Spyridon
dc.contributor.authorBoth, Kevin Gregor
dc.contributor.authorSotiropoulos, Sotiris
dc.contributor.authorChatzitakis, Athanasios
dc.date.accessioned2022-04-20T13:16:04Z
dc.date.available2022-04-20T13:16:04Z
dc.date.created2021-10-24T22:57:26Z
dc.date.issued2021
dc.identifier.citationChemSusChem. 2021, 14 (22), 4993-5003.en_US
dc.identifier.issn1864-5631
dc.identifier.urihttps://hdl.handle.net/11250/2991684
dc.description.abstractA galvanic deposition method for the in-situ formation of Pt nanoparticles (NPs) on top and inner surfaces of high-aspect-ratio black TiO2-nanotube electrodes (bTNTs) for true utilization of their total surface area has been developed. Density functional theory calculations indicated that the deposition of Pt NPs was favored on bTNTs with a preferred [004] orientation and a deposition mechanism occurring via oxygen vacancies, where electrons were localized. High-resolution transmission electron microscopy images revealed a graded deposition of Pt NPs with an average diameter of around 2.5 nm along the complete nanotube axis (length/pore diameter of 130 : 1). Hydrogen evolution reaction (HER) studies in acidic electrolytes showed comparable results to bulk Pt (per geometric area) and Pt/C commercial catalysts (per mg of Pt). The presented novel HER cathodes of minimal engineering and low noble metal loadings (μg cm−2 range) achieved low Tafel slopes (30–34 mV dec−1) and high stability in acidic conditions. This study provides important insights for the in-situ formation and deposition of NPs in high-aspect-ratio structures for energy applications.en_US
dc.language.isoengen_US
dc.publisherWiley - VCH Verlag GmbHen_US
dc.rightsNavngivelse 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.no*
dc.titleGalvanic Deposition of Pt Nanoparticles on Black TiO2 Nanotubes for Hydrogen Evolving Cathodesen_US
dc.typePeer revieweden_US
dc.typeJournal articleen_US
dc.description.versionpublishedVersionen_US
dc.rights.holder© 2021 The Authors.ChemSusChem published by Wiley-VCH GmbH.This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium,provided the original work is properly citeden_US
dc.source.pagenumber4993-5003en_US
dc.source.volume14en_US
dc.source.journalChemSusChemen_US
dc.source.issue22en_US
dc.identifier.doi10.1002/cssc.202101559
dc.identifier.cristin1948080
dc.relation.projectNorges forskningsråd: 197405en_US
dc.relation.projectNorges forskningsråd: 288320en_US
dc.relation.projectNorges forskningsråd: 275058en_US
dc.relation.projectNorges forskningsråd: NN4604ken_US
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode1


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