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dc.contributor.authorCastegnaro, Marcus Vinicíuspt_BR
dc.contributor.authorGorgeski, Andreiapt_BR
dc.contributor.authorBalke, Benjaminpt_BR
dc.contributor.authorAlves, Maria do Carmo Martinspt_BR
dc.contributor.authorMorais, Jonderpt_BR
dc.date.accessioned2015-12-23T02:40:40Zpt_BR
dc.date.issued2016pt_BR
dc.identifier.issn2040-3364pt_BR
dc.identifier.urihttp://hdl.handle.net/10183/131292pt_BR
dc.description.abstractThis work reports on the synthesis and characterization of PdxCu1−x (x = 0.7, 0.5 and 0.3) nanoalloys obtained via an eco-friendly chemical reduction method based on ascorbic acid and trisodium citrate. The average size of the quasi-spherical nanoparticles (NPs) obtained by this method was about 4 nm, as observed by TEM. The colloids containing different NPs were then supported on carbon in order to produce powder samples (PdxCu1−x/C) whose electronic and structural properties were probed by different techniques. XRD analysis indicated the formation of crystalline PdCu alloys with a nanoscaled crystallite size. Core-level XPS results provided a fingerprint of a charge transfer process between Pd and Cu and its dependency on the nanoalloy composition. Additionally, it was verified that alloying was able to change the NP’s reactivity towards oxidation and reduction. Indeed, the higher the amount of Pd in the nanoalloy, less oxidized are both the Pd and the Cu atoms in the as-prepared samples. Also, in situ XANES experiments during thermal treatment under a reducing atmosphere showed that the temperature required for a complete reduction of the nanoalloys depends on their composition. These results envisage the control at the atomic level of novel catalytic properties of such nanoalloys.en
dc.format.mimetypeapplication/pdfpt_BR
dc.language.isoengpt_BR
dc.relation.ispartofNanoscale. Cambridge. Vol. 8, no. 1 (Jan. 2016), p. 641-647pt_BR
dc.rightsOpen Accessen
dc.subjectReatividade quimicapt_BR
dc.subjectNanopartículaspt_BR
dc.titleCharge transfer effects on the chemical reactivity of PdxCu1−x nanoalloyspt_BR
dc.typeArtigo de periódicopt_BR
dc.identifier.nrb000981654pt_BR
dc.type.originEstrangeiropt_BR


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