Catalyst Support Effect on the Activity and Durability of Magnetic Nanoparticles

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dc.contributor Aalto-yliopisto fi
dc.contributor Aalto University en Davodi, Fatemeh Mühlhausen, Elisabeth Tavakkoli, Mohammad Sainio, Jani Jiang, Hua Gökce, Bilal Marzun, Galina Kallio, Tanja 2018-11-09T13:05:41Z 2018-11-09T13:05:41Z 2018-09-19
dc.identifier.citation Davodi , 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 . DOI: 10.1021/acsami.8b08830 en
dc.identifier.issn 1944-8244
dc.identifier.issn 1944-8252
dc.identifier.other PURE UUID: 45130886-3b3a-4b75-acbf-3dfb4a3b7ce3
dc.identifier.other PURE ITEMURL:
dc.identifier.other PURE LINK:
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dc.description.abstract Earth-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.format.extent 12
dc.format.extent 31300-31311
dc.format.mimetype application/pdf
dc.language.iso en en
dc.relation.ispartofseries ACS Applied Materials and Interfaces en
dc.relation.ispartofseries Volume 10, issue 37 en
dc.rights openAccess en
dc.subject.other Materials Science(all) en
dc.subject.other 114 Physical sciences en
dc.subject.other 221 Nanotechnology en
dc.title Catalyst Support Effect on the Activity and Durability of Magnetic Nanoparticles en
dc.type A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä fi
dc.description.version Peer reviewed en
dc.contributor.department Department of Chemistry and Materials Science
dc.contributor.department University of Duisburg-Essen
dc.contributor.department Department of Applied Physics
dc.subject.keyword carbon nanotubes
dc.subject.keyword catalyst support
dc.subject.keyword core-shell nanoparticles
dc.subject.keyword maghemite (γ-FeO)
dc.subject.keyword polymer functionalization
dc.subject.keyword self-assembly
dc.subject.keyword water splitting
dc.subject.keyword Materials Science(all)
dc.subject.keyword 114 Physical sciences
dc.subject.keyword 221 Nanotechnology
dc.identifier.urn URN:NBN:fi:aalto-201811095641
dc.identifier.doi 10.1021/acsami.8b08830
dc.type.version publishedVersion

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