Sub-15 nm CeO2 nanowires as an efficient nonnoble metal catalyst in the room-temperature oxidation of aniline

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dc.contributor.authorSILVA, ANDERSON G.M. da
dc.contributor.authorBATALHA, DANIEL C.
dc.contributor.authorRODRIGUES, THENNER S.
dc.contributor.authorCANDIDO, EDUARDO G.
dc.contributor.authorLUZ, SULUSMON C.
dc.contributor.authorFREITAS, ISABEL C. de
dc.contributor.authorFONSECA, FABIO C.
dc.contributor.authorOLIVEIRA, DANIELA C. de
dc.contributor.authorTAYLOR, JASON G.
dc.contributor.authorTORRESI, SUSANA I.C. de
dc.contributor.authorCAMARGO, PEDRO H.C.
dc.contributor.authorFAJARDO, HUMBERTO V.
dc.coverageInternacionalpt_BR
dc.date.accessioned2018-12-13T12:06:01Z
dc.date.available2018-12-13T12:06:01Z
dc.date.issued2018pt_BR
dc.description.abstractWe described herein the facile synthesis of sub-15 nm CeO2 nanowires based on a hydrothermal method without the use of any capping/stabilizing agent, in which an oriented attachment mechanism took place during the CeO2 nanowire formation. The synthesis of sub-15 nm CeO2 nanowires could be achieved on relatively large scales (∼2.6 grams of nanowires per batch), in high yields (>94%), and at low cost. To date, there are only a limited number of successful attempts towards the synthesis of CeO2 nanowires with such small diameters, and the reported protocols are typically limited to low amounts. The nanowires displayed uniform shapes and sizes, high surface areas, an increased number of oxygen defects sites, and a high proportion of Ce3+/Ce4+ surface species. These features make them promising candidates for oxidation reactions. To this end, we employed the selective oxidation of aniline as a model transformation. The sub-15 nm CeO2 nanowires catalyzed the selective synthesis of nitrosobenzene (up to 98% selectivity) from aniline at room temperature using H2O2 as the oxidant. The effect of solvent and temperature during the catalytic reaction was investigated. We found that such parameters played an important role in the control of the selectivity. The improved catalytic activities observed for the sub-15 nm nanowires could be explained by: i) the uniform morphology with a typical dimension of 11 ± 2 nm in width, which provides higher specific surface areas relative to those of conventional catalysts; ii) the significant concentration of oxygen vacancies and high proportion of Ce3+/Ce4+ species at the surface that represent highly active sites towards oxidation reactions; iii) the crystal growth along the (110) highly catalytically active crystallographic directions, and iv) the mesoporous surface which is easily accessible by liquid substrates. The results reported herein demonstrated high activities under ambient conditions, provided novel insights into selectivities, and may inspire novel metal oxide-based catalysts with desired performances.pt_BR
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)pt_BR
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de Minas Gerais (FAPEMIG)pt_BR
dc.description.sponsorshipIDFAPESP: 15/21366-9; 15/26308-7; 14/09087-4; 14/50279-4pt_BR
dc.description.sponsorshipIDFAPEMIG: CEX-APQ-00369-14pt_BR
dc.format.extent1828-1839pt_BR
dc.identifier.citationSILVA, ANDERSON G.M. da; BATALHA, DANIEL C.; RODRIGUES, THENNER S.; CANDIDO, EDUARDO G.; LUZ, SULUSMON C.; FREITAS, ISABEL C. de; FONSECA, FABIO C.; OLIVEIRA, DANIELA C. de; TAYLOR, JASON G.; TORRESI, SUSANA I.C. de; CAMARGO, PEDRO H.C.; FAJARDO, HUMBERTO V. Sub-15 nm CeO2 nanowires as an efficient nonnoble metal catalyst in the room-temperature oxidation of aniline. <b>Catalysis Science and Technology</b>, v. 8, n. 7, p. 1828-1839, 2018. DOI: <a href="https://dx.doi.org/10.1039/c7cy02402a">10.1039/c7cy02402a</a>. Disponível em: http://repositorio.ipen.br/handle/123456789/29366.
dc.identifier.doi10.1039/c7cy02402apt_BR
dc.identifier.fasciculo7pt_BR
dc.identifier.issn2044-4753pt_BR
dc.identifier.orcidaguardandopt_BR
dc.identifier.orcidhttps://orcid.org/0000-0003-0708-2021
dc.identifier.percentilfi78.72pt_BR
dc.identifier.percentilfiCiteScore84.00
dc.identifier.urihttp://repositorio.ipen.br/handle/123456789/29366
dc.identifier.vol8pt_BR
dc.relation.ispartofCatalysis Science and Technologypt_BR
dc.rightsclosedAccesspt_BR
dc.subjectnanostructures
dc.subjectnanowires
dc.subjectcerium oxides
dc.subjectaniline
dc.subjectoxidation
dc.subjectcatalytic effects
dc.subjectsynthesis
dc.titleSub-15 nm CeO2 nanowires as an efficient nonnoble metal catalyst in the room-temperature oxidation of anilinept_BR
dc.typeArtigo de periódicopt_BR
dspace.entity.typePublication
ipen.autorFABIO CORAL FONSECA
ipen.autorTHENNER SILVA RODRIGUES
ipen.codigoautor943
ipen.codigoautor14641
ipen.contributor.ipenauthorFABIO CORAL FONSECA
ipen.contributor.ipenauthorTHENNER SILVA RODRIGUES
ipen.date.recebimento18-12pt_BR
ipen.identifier.fi5.726pt_BR
ipen.identifier.fiCiteScore9.7
ipen.identifier.ipendoc25155pt_BR
ipen.identifier.iwosWoSpt_BR
ipen.range.fi4.500 - 5.999
ipen.range.percentilfi75.00 - 100.00
ipen.type.genreArtigo
relation.isAuthorOfPublicationaa9a4b52-270e-4ea4-a566-a1107da1e0cf
relation.isAuthorOfPublication290c6b26-c06a-4802-b418-2360378a859c
relation.isAuthorOfPublication.latestForDiscovery290c6b26-c06a-4802-b418-2360378a859c
sigepi.autor.atividadeRODRIGUES, THENNER S.:14641:610:Npt_BR
sigepi.autor.atividadeFONSECA, FABIO C.:943:610:Npt_BR
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