Comparing thermal and chemical removal of nanoparticle stabilizing ligands - effect on catalytic activity and stability

Show simple item record Collins, Gillian Davitt, Fionán O'Dwyer, Colm Holmes, Justin D. 2018-12-03T12:30:33Z 2018-12-03T12:30:33Z 2018-11-16
dc.identifier.citation Collins, G., Davitt, F., O'Dwyer, C. and Holmes, J. D. (2018) 'Comparing thermal and chemical removal of nanoparticle stabilizing ligands - effect on catalytic activity and stability', ACS Applied Nano Materials. doi:10.1021/acsanm.8b02019 en
dc.identifier.issn 2574-0970
dc.identifier.doi 10.1021/acsanm.8b02019
dc.description.abstract The use of stabilizers is an essential part of colloidal catalyst preparation, however their impact on catalytic behavior is challenging to elucidate. This report evaluates three commonly used nanoparticle (NP) stabilizing ligands, oleylamine (OAm), dodecanethiol (DDT) and the polymer polyvinylpyrrolidone (PVP). Stabilizing ligands are removed using thermal and chemical pre-treatments and the surface chemistry of the NPs is assessed using X-ray photoelectron spectroscopy (XPS). The method of ligand removal significantly altered the catalytic behavior of colloidal NPs. Chemical treatment was less effective in completely removing the capping ligands, however catalytic activity could be improved by partial ligand removal. Thermal pre-treatment decreased the activity of all the catalysts, even when the catalyst diameter and Pd surface chemistry was reasonably preserved. XPS analysis further revealed changes in the interfacial chemistry of the treated catalysts such as the formation of oxidized sulfur species formed during annealing DDT-Pd NPs and conformational changes in PVP capping ligands as a result of thermal treatment. en
dc.description.sponsorship Irish Research Council (New Foundations Scheme) en
dc.format.mimetype application/pdf en
dc.language.iso en en
dc.publisher American Chemical Society en
dc.rights © 2018, American Chemical Society. This document is the Accepted Manuscript version of a Published Work that appeared in final form in ACS Applied Nano Materials after technical editing by the publisher. To access the final edited and published work see en
dc.subject Nanoparticles en
dc.subject Capping ligands en
dc.subject Palladium en
dc.subject Surface chemistry en
dc.subject XPS en
dc.subject Suzuki coupling en
dc.title Comparing thermal and chemical removal of nanoparticle stabilizing ligands - effect on catalytic activity and stability en
dc.type Article (peer-reviewed) en
dc.internal.authorcontactother Colm O'Dwyer, Chemistry, University College Cork, Cork, Ireland. +353-21-490-3000 Email: en
dc.internal.availability Full text available en Access to this article is restricted until 12 months after publication by request of the publisher. en 2019-11-16 2018-11-29T09:38:43Z
dc.description.version Accepted Version en
dc.internal.rssid 463687752
dc.internal.rssid 468999915
dc.contributor.funder Irish Research Council en
dc.contributor.funder Science Foundation Ireland en
dc.description.status Peer reviewed en
dc.identifier.journaltitle ACS Applied Nano Materials en
dc.internal.copyrightchecked Yes en
dc.internal.licenseacceptance Yes en
dc.internal.IRISemailaddress en
dc.internal.IRISemailaddress en
dc.internal.bibliocheck In press. Add vol. / issue / page numbers. Amend citation as necessary.
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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