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Supported gold nanoparticles as reusable catalysts for oxidation reactions of industrial significance

2017-04Journal article Restricted access
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dc.contributor.authorMartins, Luisa
dc.contributor.authorCarabineiro, Sonia Alexandra Correia
dc.contributor.authorWang, Jiawei
dc.contributor.authorRocha, Bruno G. M.
dc.contributor.authorMaldonado Hódar, Francisco Jose
dc.contributor.authorPombeiro, Armando
dc.date.accessioned2017-05-23T09:35:36Z
dc.date.available2017-05-23T09:35:36Z
dc.date.issued2017-04
dc.description.abstractThe efficient single-pot oxidative functionalisation of alkanes and alcohols under mild conditions was catalysed by Au nanoparticles supported on Al2O3, Fe2O3, ZnO and TiO2. The obtained materials were tested for cyclohexane oxidation under mild conditions (60 °C, atmospheric pressure) using an environmentally friendly oxidant (H2O2). The materials were also tested in the oxidation of benzyl alcohol and methylbenzyl alcohol in the presence of tert-butylhydroperoxide as the oxidant under microwave irradiation. With regard to cyclohexane oxidation, all materials were highly selective towards the formation of cyclohexanol and cyclohexanone. No traces of byproducts were detected under the optimised conditions. Au on Fe2O3 led to the best results (13.5 % yield). This system showed an interesting almost exclusive formation of cyclohexanol at 4 h reaction time. Catalyst recycling was tested in up to five cycles, and the catalyst maintained almost the original level of activity after three cycles with no significant leaching. With regard to oxidation of benzyl alcohol and methylbenzyl alcohol, all materials were highly selective towards the formation of benzaldehyde or acetophenone, respectively. No traces of byproducts were detected. Addition of Au increased alcohol conversion from 5 (TiO2) to 91 % (Au/TiO2). The recycling of Au/TiO2 was tested in up to 10 cycles, and the catalytic activity remained high in the first four cycles.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationMARTINS, Luísa M. D. R. S.; [et al] – Supported gold nanoparticles as reusable catalysts for oxidation reactions of industrial significance. ChemCatChem. ISSN 1867-3899. Vol. 9, N.º 7 (2017), pp. 1211-1221pt_PT
dc.identifier.doi10.1002/cctc.201601442pt_PT
dc.identifier.issn1867-3899
dc.identifier.urihttp://hdl.handle.net/10400.21/7044
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherChemPubSoc Europept_PT
dc.titleSupported gold nanoparticles as reusable catalysts for oxidation reactions of industrial significancept_PT
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage1221pt_PT
oaire.citation.issue7pt_PT
oaire.citation.startPage1211pt_PT
oaire.citation.titleChemCatChempt_PT
oaire.citation.volume9pt_PT
person.familyNameMartins
person.familyNameRocha
person.familyNameMaldonado Hódar
person.familyNamePombeiro
person.givenNameLuisa
person.givenNameBruno G. M.
person.givenNameFrancisco Jose
person.givenNameArmando
person.identifier637885
person.identifier.ciencia-idE218-E297-A4EA
person.identifier.ciencia-id1212-CC72-1B41
person.identifier.ciencia-id9C18-D57C-7958
person.identifier.ciencia-id8311-38FA-CEFB
person.identifier.orcid0000-0002-5403-9352
person.identifier.orcid0000-0003-0357-0677
person.identifier.orcid0000-0002-2468-8407
person.identifier.orcid0000-0001-8323-888X
person.identifier.ridG-6210-2011
person.identifier.ridK-3018-2014
person.identifier.ridG-3614-2017
person.identifier.ridL-9287-2015
person.identifier.ridI-5945-2012
person.identifier.scopus-author-id8650947800
person.identifier.scopus-author-id6602118574
person.identifier.scopus-author-id55179069100
person.identifier.scopus-author-id7003289379
person.identifier.scopus-author-id7006067269
rcaap.rightsclosedAccesspt_PT
rcaap.typearticlept_PT
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