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Preparation of carbon aerogel supported platinum catalysts for the selective hydrogenation of cinnamaldehyde

Machado, Bruno F. ; Morales-Torres, Sergio ; Pérez-Cadenas, Agustín F. ; Maldonado-Hódar, Francisco J. ; Carrasco-Marín, Francisco ; Silva, Adrián M.T. ; Figueiredo, José L. ; Faria, Joaquim L.

Applied catalysis. A, General, 2012-05, Vol.425-426, p.161-169 [Periódico revisado por pares]

Kidlington: Elsevier B.V

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Título:
Preparation of carbon aerogel supported platinum catalysts for the selective hydrogenation of cinnamaldehyde
Autor: Machado, Bruno F. ; Morales-Torres, Sergio ; Pérez-Cadenas, Agustín F. ; Maldonado-Hódar, Francisco J. ; Carrasco-Marín, Francisco ; Silva, Adrián M.T. ; Figueiredo, José L. ; Faria, Joaquim L.
Assuntos: Aerogels ; Carbon ; Carbon aerogel ; Catalysis ; Catalysts ; Chemistry ; Cinnamaldehyde ; Colloidal state and disperse state ; Exact sciences and technology ; General and physical chemistry ; Hydrogenation ; Materials selection ; Oxygenated ; Platinum ; Porous materials ; Selective hydrogenation ; Surface chemistry ; Theory of reactions, general kinetics. Catalysis. Nomenclature, chemical documentation, computer chemistry
É parte de: Applied catalysis. A, General, 2012-05, Vol.425-426, p.161-169
Notas: ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
Descrição: [Display omitted] ► Selective hydrogenation of cinnamaldehyde is investigated using Pt/carbon aerogels. ► Oxidation of CA's introduces surface groups while preserving the original porosity. ► Pt dispersion is strongly influenced by the acidic oxygenated surface groups. ► Selectivity towards COL depends on both mesopores and acidic character of the CA. ► Thermal treatment in N2 at 973K is found to favor the hydrogenation of the CC bond. The selective hydrogenation of cinnamaldehyde is investigated using platinum catalysts supported on carbon aerogels with different textural and chemical properties. Despite the large amount of oxygenated surface groups introduced after the oxidation step, the original porosity of the carbon aerogels is maintained. The oxidation treatments performed on the materials are found to strongly influence the surface chemistry which in turn affects the Pt dispersion, yielding larger metal particles after the chemical modifications and the H2 pre-treatment. The presence of mesopores and the increase of the acidic character in the carbon aerogels lead to a higher catalytic activity and selectivity towards cinnamyl alcohol when compared with that obtained for the untreated materials. A thermal treatment at 973K is found to favor the hydrogenation of the olefinic bond when using carbon aerogels, due to the remaining oxygenated surface groups, at variance with other previously reported carbon supports (xerogels and nanotubes).
Editor: Kidlington: Elsevier B.V
Idioma: Inglês

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Preparation of carbon aerogel supported platinum catalysts for the selective hydrogenation of cinnamaldehyde

Machado, Bruno F. ; Morales-Torres, Sergio ; Pérez-Cadenas, Agustín F. ; Maldonado-Hódar, Francisco J. ; Carrasco-Marín, Francisco ; Silva, Adrián M.T. ; Figueiredo, José L. ; Faria, Joaquim L.

Kidlington: Elsevier B.V

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