Bimetallic Rh-Ge and Pt-Ge catalysts supported on TiO2 for citral hydrogenation II. Catalytic properties - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Applied Catalysis A : General Année : 2006

Bimetallic Rh-Ge and Pt-Ge catalysts supported on TiO2 for citral hydrogenation II. Catalytic properties

Résumé

Bimetallic Rh-Ge/TiO2 and Pt-Ge/TiO2 catalysts prepared by surface redox reaction (catalytic reduction method) were tested for the selective hydrogenation of citral. Samples were reduced either at 300 degrees C or at 500 degrees C (SMSI effect). For both Rh and Pt series, the unsaturated alcohols (UA) selectivity goes through an optimum as a function of the germanium content whatever the reduction temperature. For low Ge loadings, it was possible to combine the bimetallic and SMSI effects, inducing a high UA selectivity on bimetallic catalysts supported on TiO2. On the other hand, at high Ge loadings the bimetallic effect was predominant and led also to a high UA selectivity. Moreover, TiO2 support contributed to stabilize the bimetallic Rh-Ge and Pt-Ge particles prepared by catalytic reduction toward an air exposure at ambient temperature.

Domaines

Catalyse

Dates et versions

hal-01343112 , version 1 (07-07-2016)

Identifiants

Citer

T. Ekou, A. Vicente, G. Lafaye, C. Especel, P. Marecot. Bimetallic Rh-Ge and Pt-Ge catalysts supported on TiO2 for citral hydrogenation II. Catalytic properties . Applied Catalysis A : General, 2006, 314, pp.73-80. ⟨10.1016/j.apcata.2006.08.004⟩. ⟨hal-01343112⟩
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