oa Pt/Al2O3 with High Metal Loading Catalysts for the Hydrogenation of Nitrobenzene

Platinum group metal nanoparticles supported on oxides such as Al2O3 pellets are key heterogeneous catalysts for a range of chemical reactions. The metal loading, particle size and dispersion of precious metal nanoparticles over the support influence activity, selectivity and stability. In this work, supported Pt catalysts are prepared on Al2O3 pellets using different methods: a surfactant-free colloidal synthesis, an impregnation and a precipitation method. At high Pt loadings, the benefits of the colloidal synthesis is to lead to catalysts with optimized activity with respect to the hydrogenation of nitrobenzene.