Controlled morphology and dimensionality evolution of NiPd bimetallic nanostructures
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.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.date.accessioned | 2021-01-12T14:06:10Z | |
dc.date.available | 2021-01-12T14:06:10Z | |
dc.date.issued | 2020-10-13 | |
dc.date.updated | 2021-01-04T15:20:37Z | |
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.description.status | Peer reviewed | en |
dc.description.version | Published Version | en |
dc.format.mimetype | application/pdf | en |
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.doi | 10.1016/j.jcis.2020.10.030 | en |
dc.identifier.endpage | 489 | en |
dc.identifier.issn | 0021-9797 | |
dc.identifier.journaltitle | Journal of Colloid and Interface Science | en |
dc.identifier.startpage | 480 | en |
dc.identifier.uri | https://hdl.handle.net/10468/10900 | |
dc.identifier.volume | 585 | en |
dc.language.iso | en | en |
dc.publisher | Elsevier | en |
dc.relation.project | info:eu-repo/grantAgreement/SFI/SFI Research Centres/12/RC/2278/IE/Advanced Materials and BioEngineering Research Centre (AMBER)/ | 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 |
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