On the lattice dilation of palladium nanoparticles and a new methodology for the quantification of interstitials

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.contributorUniversidade Federal do ABC (UFABC)-
Autor(es): dc.creatorCiapina, Eduardo G. [UNESP]-
Autor(es): dc.creatordos Santos, Monica L. [UNESP]-
Autor(es): dc.creatorSantos, Rayana M.I.S. [UNESP]-
Autor(es): dc.creatorPalombarini, Julio [UNESP]-
Autor(es): dc.creatorAlmeida Júnior, Osvaldo P. [UNESP]-
Autor(es): dc.creatorSantana, Jéssica C.C. de Castro-
Autor(es): dc.creatorModesto, Diego A.-
Autor(es): dc.creatorLanfredi, Alexandre J.C.-
Autor(es): dc.creatorSantos, Sydney F.-
Data de aceite: dc.date.accessioned2022-02-22T00:47:08Z-
Data de disponibilização: dc.date.available2022-02-22T00:47:08Z-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2021-11-09-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.jallcom.2021.160628-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/206460-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/206460-
Descrição: dc.descriptionIn contrast to the expected behavior for metallic nanoparticles (NPs) where a contraction of the lattice parameter occurs as the crystal size decreases, palladium NPs experience both lattice contraction and dilation. Such dual behavior has not been discussed in detail so far but it is of paramount importance given Pd is widely used in catalysis, electrocatalysis, gas sensors, and many other areas, and all these applications are strongly affected by structural change at the NP surface. Herein, we address the issue investigating both lattice contraction and dilation of Pd NPs synthesized by chemical reduction and also by compiling several results already published in the literature. It was found that when the synthesis is carried out in the absence of a substrate, dilation of the unit cell was detected; in contrast, if the synthesis is carried out in the presence of a substrate (carbon and RuO2), lattice contraction is observed. Lattice dilation was ascribed by the incorporation of interstitial atoms, such as H, C, O, which is suppressed on supported catalysts likely by a spillover effect from the metallic phase to the substrate, thus yielding to lattice contraction. Furthermore, we propose a new methodology to assess the total variation of the lattice parameter in the case of lattice dilation taking into consideration the expected contracted values for nanosized particles. To illustrate the importance of such new approach, it was possible to show a particle-size dependence of the carbon solubility on Pd nanostructures based on literature data.-
Descrição: dc.descriptionCoordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionDepartment of Chemistry and Energy School of Engineering São Paulo State University (UNESP)-
Descrição: dc.descriptionCenter of Engineering Modeling and Applied Social Sciences Federal University of ABC UFABC-
Descrição: dc.descriptionDepartment of Chemistry and Energy School of Engineering São Paulo State University (UNESP)-
Descrição: dc.descriptionFAPESP: # 19/22183-6-
Descrição: dc.descriptionCNPq: # 309812/2017-8-
Descrição: dc.descriptionCNPq: # 476690/2013-7-
Idioma: dc.languageen-
Relação: dc.relationJournal of Alloys and Compounds-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectChemical synthesis-
Palavras-chave: dc.subjectFuel cells-
Palavras-chave: dc.subjectHydrogen absorbing materials-
Palavras-chave: dc.subjectMetals and alloys-
Palavras-chave: dc.subjectNanostructured materials-
Palavras-chave: dc.subjectX-ray diffraction-
Título: dc.titleOn the lattice dilation of palladium nanoparticles and a new methodology for the quantification of interstitials-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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