Controlled morphology and dimensionality evolution of NiPd bimetallic nanostructures

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dc.contributor.author Maize, Mai
dc.contributor.author El-Boraey, Hanaa A.
dc.contributor.author Ayad, Mohamed I.
dc.contributor.author Holmes, Justin D.
dc.contributor.author Collins, Gillian
dc.date.accessioned 2021-01-12T14:06:10Z
dc.date.available 2021-01-12T14:06:10Z
dc.date.issued 2020-10-13
dc.identifier.citation Maize, M., El-Boraey, H. A., Ayad, M. I., Holmes, J. D. and Collins, G. (2021) 'Controlled morphology and dimensionality evolution of NiPd bimetallic nanostructures', Journal of Colloid and Interface Science, 585, pp. 480-489. doi: 10.1016/j.jcis.2020.10.030 en
dc.identifier.volume 585 en
dc.identifier.startpage 480 en
dc.identifier.endpage 489 en
dc.identifier.issn 0021-9797
dc.identifier.uri http://hdl.handle.net/10468/10900
dc.identifier.doi 10.1016/j.jcis.2020.10.030 en
dc.description.abstract Controlling the morphology of noble metal-based nanostructures is a powerful strategy for optimizing their catalytic performance. Here, we report a one-pot aqueous synthesis of versatile NiPd nanostructures at room temperature without employing organic solvents or surfactants. The synthesis can be tuned to form zero-dimensional (0D) architectures, such as core–shell and hollow nanoparticles (NPs), as well as nanostructures with higher dimensionality, such as extended nanowire networks and three-dimensional (3D) nanodendrites. The diverse morphologies were successfully obtained through modification of the HCl concentration in the Pd precursor solution, and the reaction aging time. An in-depth understanding of the formation mechanism and morphology evolution are described in detail. A key factor in the structural evolution of the nanostructures was the ability to tune the reduction rate and to protonate the citrate stabiliser by adding HCl. Spherical core–shell NPs were formed by the galvanic replacement-free deposition of Pd on Ni NPs which can be transformed to hollow NPs via a corrosion process. High concentrations of HCl led to the transition of isotropic spherical NPs into anisotropic wormlike nanowire networks, created through an oriented attachment process. Aging of these nanowire networks resulted in the formation of 3D porous nanodendrites via a corrosion process. The diverse structures of NiPd NPs were anchored onto acid treated-activated carbon (AC) and exhibited improved catalytic efficiency towards the hydrogenation of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP). en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher Elsevier en
dc.relation.uri https://www.sciencedirect.com/science/article/pii/S0021979720313539
dc.rights © 2020 The Authors. Published by Elsevier Inc. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/) en
dc.rights.uri http://creativecommons.org/licenses/by/4.0/ en
dc.subject 4-nitrophenol en
dc.subject Catalysts en
dc.subject Core-shell structure en
dc.subject Dendritic structure en
dc.subject Hollow structure en
dc.subject Nanowire network structure en
dc.subject NiPd bimetallic nanoparticles en
dc.subject Reaction mechanism en
dc.subject Shape control en
dc.subject Structural evolution en
dc.title Controlled morphology and dimensionality evolution of NiPd bimetallic nanostructures en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Justin D. Holmes, Chemistry, University College Cork, Cork, Ireland. +353-21-490-3000 Email: j.holmes@ucc.ie en
dc.internal.availability Full text available en
dc.date.updated 2021-01-04T15:20:37Z
dc.description.version Published Version en
dc.internal.rssid 550118377
dc.contributor.funder Ministry of Higher Education, Egypt en
dc.contributor.funder Egyptian Government en
dc.contributor.funder Egyptian Bureau for Cultural & Educational Affairs en
dc.contributor.funder Egyptian Embassy in London, UK en
dc.description.status Peer reviewed en
dc.identifier.journaltitle Journal of Colloid and Interface Science en
dc.internal.copyrightchecked No
dc.internal.licenseacceptance Yes en
dc.internal.IRISemailaddress j.holmes@ucc.ie en
dc.internal.IRISemailaddress g.collins@ucc.ie en
dc.relation.project info:eu-repo/grantAgreement/SFI/SFI Research Centres/12/RC/2278/IE/Advanced Materials and BioEngineering Research Centre (AMBER)/ en


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© 2020 The Authors. Published by Elsevier Inc. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/) Except where otherwise noted, this item's license is described as © 2020 The Authors. Published by Elsevier Inc. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/)
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