Site-selective ethanol conversion over supported copper catalysts
| Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
|---|---|
| Data(s) |
20/05/2014
20/05/2014
05/09/2012
|
| Resumo |
Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) The origin and influence of active sites on supported copper catalysts, and their catalytic properties for ethanol conversion, were investigated using Cu/SiO2, Cu2O/SiO2, and Cu/ZrO2. Diffuse reflectance infrared Fourier transform spectroscopy of adsorbed CO revealed that Cu1+ was more prevalent than Cu-0 species at the Cu/SiO2 surface, and that Cu-0 was the main species on Cu/ZrO2. The Cu1+/Cu-0 pair provided by Cu/SiO2 generates sites that are highly selective for the dehydrogenation of ethanol. Ethyl acetate can be formed from ethanol and acetaldehyde at ZrO2 or Cu surfaces. A combination of the Cu1+/Cu-0 pair and Cu-0 interfaced to ZrO2 is needed to efficiently transform ethanol to ethyl acetate. (C) 2012 Elsevier B.V. All rights reserved. |
| Formato |
122-126 |
| Identificador |
http://dx.doi.org/10.1016/j.catcom.2012.05.008 Catalysis Communications. Amsterdam: Elsevier B.V., v. 26, p. 122-126, 2012. 1566-7367 http://hdl.handle.net/11449/25547 10.1016/j.catcom.2012.05.008 WOS:000308285100025 |
| Idioma(s) |
eng |
| Publicador |
Elsevier B.V. |
| Relação |
Catalysis Communications |
| Direitos |
closedAccess |
| Palavras-Chave | #DRIFTS #XANES #Zirconia polymorphs #Hydrogen #Copper catalysts #Ethanol chemistry |
| Tipo |
info:eu-repo/semantics/article |
