Publicação: Site-selective ethanol conversion over supported copper catalysts
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Elsevier B.V.
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Artigo
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Resumo
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.
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DRIFTS, XANES, Zirconia polymorphs, Hydrogen, Copper catalysts, Ethanol chemistry
Idioma
Inglês
Como citar
Catalysis Communications. Amsterdam: Elsevier B.V., v. 26, p. 122-126, 2012.
