Mesoporous WCx Films with NiO‐Protected Surface: Highly Active Electrocatalysts for the Alkaline Oxygen Evolution Reaction

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dc.contributor.authorFrisch, Marvin
dc.contributor.authorYe, Meng‐Yang
dc.contributor.authorHamid Raza, Muhammad
dc.contributor.authorArinchtein, Aleks
dc.contributor.authorBernsmeier, Denis
dc.contributor.authorGomer, Anna
dc.contributor.authorBredow, Thomas
dc.contributor.authorPinna, Nicola
dc.contributor.authorKraehnert, Ralph
dc.date.accessioned2022-03-31T07:49:10Z
dc.date.available2022-03-31T07:49:10Z
dc.date.issued2021-09-08
dc.date.updated2022-03-21T05:28:23Z
dc.description.abstractMetal carbides are promising materials for electrocatalytic reactions such as water electrolysis. However, for application in catalysis for the oxygen evolution reaction (OER), protection against oxidative corrosion, a high surface area with facile electrolyte access, and control over the exposed active surface sites are highly desirable. This study concerns a new method for the synthesis of porous tungsten carbide films with template‐controlled porosity that are surface‐modified with thin layers of nickel oxide (NiO) to obtain active and stable OER catalysts. The method relies on the synthesis of soft‐templated mesoporous tungsten oxide (mp. WOx) films, a pseudomorphic transformation into mesoporous tungsten carbide (mp. WCx), and a subsequent shape‐conformal deposition of finely dispersed NiO species by atomic layer deposition (ALD). As theoretically predicted by density functional theory (DFT) calculations, the highly conductive carbide support promotes the conversion of Ni2+ into Ni3+, leading to remarkably improved utilization of OER‐active sites in alkaline medium. The obtained Ni mass‐specific activity is about 280 times that of mesoporous NiOx (mp. NiOx) films. The NiO‐coated WCx catalyst achieves an outstanding mass‐specific activity of 1989 A gNi−1 in a rotating‐disc electrode (RDE) setup at 25 °C using 0.1 m KOH as the electrolyte.en
dc.description.sponsorshipBMBF, 03EK3052A, Verbundvorhaben ATO-KAT: Atomar dünn beschichtete poröse Elektroden als neuartige Katalysatoren für die Wasser-Elektrolyse: - leitfähige Träger und Elektrochemie -en
dc.description.sponsorshipBMBF, 03EK3052C, Verbundvorhaben ATO-KAT: Quantenchemische Berechnung beschichteter dotierter Metalloxide als Katalysatoren für die OER.en
dc.description.sponsorshipDFG,358713534, SPP 2080: Katalysatoren und Reaktoren unter dynamischen Betriebsbedingungen für die Energiespeicherung und -wandlungen
dc.description.sponsorshipTU Berlin, Open-Access-Mittel – 2021
dc.identifier.eissn1864-564X
dc.identifier.issn1864-5631
dc.identifier.urihttps://depositonce.tu-berlin.de/handle/11303/16621
dc.identifier.urihttp://dx.doi.org/10.14279/depositonce-15398
dc.language.isoenen
dc.relation.ispartof10.14279/depositonce-15606en
dc.rights.urihttps://creativecommons.org/licenses/by-nc-nd/4.0/en
dc.subject.ddc660 Chemische Verfahrenstechnikde
dc.subject.otheratomic layer depositionen
dc.subject.otherelectrocatalysisen
dc.subject.othermetal carbidesen
dc.subject.othermesoporous materialsen
dc.subject.othernickelen
dc.titleMesoporous WCx Films with NiO‐Protected Surface: Highly Active Electrocatalysts for the Alkaline Oxygen Evolution Reactionen
dc.typeArticleen
dc.type.versionpublishedVersionen
dcterms.bibliographicCitation.doi10.1002/cssc.202101243en
dcterms.bibliographicCitation.issue21en
dcterms.bibliographicCitation.journaltitleChemSusChemen
dcterms.bibliographicCitation.originalpublishernameWileyen
dcterms.bibliographicCitation.originalpublisherplaceNew York, NYen
dcterms.bibliographicCitation.pageend4717en
dcterms.bibliographicCitation.pagestart4708en
dcterms.bibliographicCitation.volume14en
tub.accessrights.dnbfreeen
tub.affiliationFak. 2 Mathematik und Naturwissenschaften::Inst. Chemie::FG Technische Chemiede
tub.affiliation.facultyFak. 2 Mathematik und Naturwissenschaftende
tub.affiliation.groupFG Technische Chemiede
tub.affiliation.instituteInst. Chemiede
tub.publisher.universityorinstitutionTechnische Universität Berlinen

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