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dc.contributor.authorLomonosov, Vladimir
dc.contributor.authorAsselin, Jeremie
dc.contributor.authorRinge, Emilie
dc.date.accessioned2022-05-31T23:30:24Z
dc.date.available2022-05-31T23:30:24Z
dc.date.issued2022-04-29
dc.identifier.issn2058-9883
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/337645
dc.description.abstractThe reduction of 4-nitrophenol (4-NiP) to 4-aminophenol (4-AP) with an excess of sodium borohydride is commonly used as a model reaction to assess the catalytic activity of metallic nanoparticles. This reaction is considered both a potentially important step in industrial water treatment and an attractive, commercially relevant synthetic pathway. Surprisingly, an important factor, the role of the reaction medium on the reduction performance, has so far been overlooked. Here, we report a pronounced effect of the solvent on the reaction kinetics in the presence of silver and gold nanoparticles. We demonstrate that the addition of methanol, ethanol, or isopropanol to the reaction mixture leads to a dramatic decrease in the reaction rate. For typical concentrations of reactants, the reduction is completely suppressed in the presence of 50 vol% alcohols. 4-NiP reduction rate in aqueous alcohol mixtures can, however, be improved noticeably by increasing the borohydride concentration or the reaction temperature. The analysis of various factors responsible for solvent effects reveals that the decrease in the reduction rate in the presence of alcohols is related, amongst others, to a substantially higher oxygen solubility in alcohols compared to water. The results of this work show that the effects of solvent properties on reaction kinetics must be considered for unambiguous comparison and optimization of the catalytic performance of metallic nanoparticles in the liquid phase 4-NiP reduction.
dc.publisherRoyal Society of Chemistry (RSC)
dc.rightsAttribution 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.titleSolvent effects on the kinetics of 4-nitrophenol reduction by NaBH4 in the presence of Ag and Au nanoparticles
dc.typeArticle
dc.publisher.departmentDepartment of Earth Sciences
dc.date.updated2022-05-31T08:52:04Z
prism.publicationDate2022
prism.publicationNameREACTION CHEMISTRY & ENGINEERING
dc.identifier.doi10.17863/CAM.85051
dcterms.dateAccepted2022-04-22
rioxxterms.versionofrecord10.1039/d2re00044j
rioxxterms.versionVoR
dc.contributor.orcidRinge, Emilie [0000-0003-3743-9204]
dc.identifier.eissn2058-9883
rioxxterms.typeJournal Article/Review
pubs.funder-project-idEuropean Research Council (804523)
cam.issuedOnline2022-04-29
cam.depositDate2022-05-31
pubs.licence-identifierapollo-deposit-licence-2-1
pubs.licence-display-nameApollo Repository Deposit Licence Agreement


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Attribution 4.0 International
Except where otherwise noted, this item's licence is described as Attribution 4.0 International