Catalyst Support Effect on the Activity and Durability of Magnetic Nanoparticles: Toward Design of Advanced Electrocatalyst for Full Water Splitting

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dc.contributorAalto-yliopistofi
dc.contributorAalto Universityen
dc.contributor.authorDavodi, Fatemehen_US
dc.contributor.authorMühlhausen, Elisabethen_US
dc.contributor.authorTavakkoli, Mohammaden_US
dc.contributor.authorSainio, Janien_US
dc.contributor.authorJiang, Huaen_US
dc.contributor.authorGökce, Bilalen_US
dc.contributor.authorMarzun, Galinaen_US
dc.contributor.authorKallio, Tanjaen_US
dc.contributor.departmentDepartment of Chemistry and Materials Scienceen
dc.contributor.departmentDepartment of Applied Physicsen
dc.contributor.groupauthorElectrochemical Energy Conversionen
dc.contributor.groupauthorSurface Scienceen
dc.contributor.groupauthorNanoMaterialsen
dc.contributor.organizationUniversity of Duisburg-Essenen_US
dc.date.accessioned2018-11-09T13:05:41Z
dc.date.available2018-11-09T13:05:41Z
dc.date.issued2018-09-19en_US
dc.description.abstractEarth-abundant element-based inorganic-organic hybrid materials are attractive alternatives for electrocatalyzing energy conversion reactions. Such material structures do not only increase the surface area and stability of metal nanoparticles (NPs) but also modify the electrocatalytic performance. Here, we introduce, for the first time, multiwall carbon nanotubes (MWNTs) functionalized with nitrogen-rich emeraldine salt (ES) (denoted as ES-MWNT) as a promising catalyst support to boost the electrocatalytic activity of magnetic maghemite (γ-Fe2O3) NPs. The latter component has been synthesized by a simple and upscalable one-step pulsed laser ablation method on Ni core forming the core-shell Niγ-Fe2O3 NPs. The catalyst (Niγ-Fe2O3/ES-MWNT) is formed via self-assembly as strong interaction between ES-MWNT and Niγ-Fe2O3 results in NPs' encapsulation in a thin C-N shell. We further show that Ni does not directly function as an active site in the electrocatalyst but it has a crucial role in synthesizing the maghemite shell. The strong interaction between the NPs and the support improves notably the NPs' catalytic activity toward oxygen evolution reaction (OER) in terms of both onset potential and current density, ranking it among the most active catalysts reported so far. Furthermore, this material shows a superior durability to most of the current excellent OER electrocatalysts as the activity, and the structure, remains almost intact after 5000 OER stability cycles. On further characterization, the same trend has been observed for hydrogen evolution reaction, the other half-reaction of water splitting.en
dc.description.versionPeer revieweden
dc.format.extent12
dc.format.extent31300-31311
dc.format.mimetypeapplication/pdfen_US
dc.identifier.citationDavodi, F, Mühlhausen, E, Tavakkoli, M, Sainio, J, Jiang, H, Gökce, B, Marzun, G & Kallio, T 2018, ' Catalyst Support Effect on the Activity and Durability of Magnetic Nanoparticles : Toward Design of Advanced Electrocatalyst for Full Water Splitting ', ACS Applied Materials and Interfaces, vol. 10, no. 37, pp. 31300-31311 . https://doi.org/10.1021/acsami.8b08830en
dc.identifier.doi10.1021/acsami.8b08830en_US
dc.identifier.issn1944-8244
dc.identifier.issn1944-8252
dc.identifier.otherPURE UUID: 45130886-3b3a-4b75-acbf-3dfb4a3b7ce3en_US
dc.identifier.otherPURE ITEMURL: https://research.aalto.fi/en/publications/45130886-3b3a-4b75-acbf-3dfb4a3b7ce3en_US
dc.identifier.otherPURE LINK: http://www.scopus.com/inward/record.url?scp=85052280855&partnerID=8YFLogxKen_US
dc.identifier.otherPURE FILEURL: https://research.aalto.fi/files/29193840/acsami.8b08830.pdfen_US
dc.identifier.urihttps://aaltodoc.aalto.fi/handle/123456789/34600
dc.identifier.urnURN:NBN:fi:aalto-201811095641
dc.language.isoenen
dc.relation.ispartofseriesACS Applied Materials and Interfacesen
dc.relation.ispartofseriesVolume 10, issue 37en
dc.rightsopenAccessen
dc.subject.keywordcarbon nanotubesen_US
dc.subject.keywordcatalyst supporten_US
dc.subject.keywordcore-shell nanoparticlesen_US
dc.subject.keywordmaghemite (γ-FeO)en_US
dc.subject.keywordpolymer functionalizationen_US
dc.subject.keywordself-assemblyen_US
dc.subject.keywordwater splittingen_US
dc.titleCatalyst Support Effect on the Activity and Durability of Magnetic Nanoparticles: Toward Design of Advanced Electrocatalyst for Full Water Splittingen
dc.typeA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessäfi
dc.type.versionpublishedVersion
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