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Catalytic behavior of unsupported Co materials in the reformation of ethanol to hydrogen: An in situ diffuse reflectance infrared Fourier transform (DRIFT)-mass spectrometry study by Salvador Martí; Narcís Homs; Evandro Brum Pereira; Pilar Ramírez de la Piscina is a Chemistry article available to read on EtoBox.

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## Abstract New unsupported Co catalysts were studied in the ethanol steam-reforming reaction by in situ diffuse reflectance infrared spectroscopy and on-line mass spectrometry (MS) techniques. The initial ethoxy surface species evolved to surface-acyl species and to acetaldehyde intermediate at temperatures ca. 473 K. The subsequent formation of surface-acetate species occurs at ca. 573 K. Further, the acetate species mainly evolve above 573 K to H~2~ and CO~2~ products. The route to ketone formation was inhibited on these materials. The presence of surface-hydroxyl groups, which are probably related to the formation of a CoO phase under the reforming conditions, was determined. Alkaline addition shows a beneficial effect on the ethanol steam-reforming over bulk Co catalysts.

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Author

Salvador Martí; Narcís Homs; Evandro Brum Pereira; Pilar Ramírez de la Piscina

Publisher

Walter de Gruyter GmbH

Published

2008

Language

EN

Field

Chemistry (Physical Sciences)