Insights into the Preparation of Copper Catalysts Supported on Layered Double Hydroxide Derived Mixed Oxides for Ethanol Dehydrogenation

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorBP48-
Autor(es): dc.creatorSantos, Rodrigo M. M.-
Autor(es): dc.creatorBriois, Valérie-
Autor(es): dc.creatorMartins, Leandro-
Autor(es): dc.creatorSantilli, Celso V.-
Data de aceite: dc.date.accessioned2025-08-21T21:30:42Z-
Data de disponibilização: dc.date.available2025-08-21T21:30:42Z-
Data de envio: dc.date.issued2022-05-01-
Data de envio: dc.date.issued2022-05-01-
Data de envio: dc.date.issued2021-06-09-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1021/acsami.1c04541-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/233160-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/233160-
Descrição: dc.descriptionAcetaldehyde is an important chemical commodity and a building block for producing several other high-value products in the chemical industry. This has motivated the search for suitable, efficient, stable, and selective catalysts, as well as renewable raw materials such as ethanol. In this work, supported copper catalysts were prepared from CuZnAl layered double hydroxides (LDHs) with different copper contents (5, 10, and 20 wt %) for application in the ethanol dehydrogenation reaction (EDR). The samples were thoroughly characterized by a series of techniques, which allowed for analysis of all of the copper and zinc species involved in the different catalyst preparation steps and during the EDR. The results obtained by in situ quick extended X-ray absorption fine structure (EXAFS) measurements, combined with multivariate data analysis, showed that the copper content in the pristine LDH influenced the phase composition of the mixed oxide support, which consequently affected the dispersion of copper nanoparticles. The higher the copper content, the higher are the ZnAl2O4 and zinc tetrahedral prenuclei (TPN) contents, to the detriment of the ZnO content. All the samples showed high selectivity (>97%) and stability in the catalytic reactions at 300 and 350 °C, with no observed deactivation during 6 h on-stream. Although the samples with lower copper content presented higher copper dispersion and reactivity, the sample containing 20 wt % of copper outperformed the others, with greater conversion and higher activity toward acetaldehyde.-
Descrição: dc.descriptionInstitute of Chemistry São Paulo State University (UNESP), Rua Prof. Francisco Degni 55,São Paulo-
Descrição: dc.descriptionSoleil Synchrotron L'Orme des Merisiers BP48, Gif-sur-Yvette-
Descrição: dc.descriptionInstitute of Chemistry São Paulo State University (UNESP), Rua Prof. Francisco Degni 55,São Paulo-
Formato: dc.format26001-26012-
Idioma: dc.languageen-
Relação: dc.relationACS Applied Materials and Interfaces-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectacetaldehyde-
Palavras-chave: dc.subjectcopper-based catalyst-
Palavras-chave: dc.subjectethanol-dehydrogenation reaction (EDR)-
Palavras-chave: dc.subjectlayered double hydroxide (LDH)-
Palavras-chave: dc.subjectoperando quick-EXAFS-
Título: dc.titleInsights into the Preparation of Copper Catalysts Supported on Layered Double Hydroxide Derived Mixed Oxides for Ethanol Dehydrogenation-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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