Synthesis of platinum–tin/alumina reforming catalysts from a well-defined platinum–tin precursor complex
作者： C. Audo , J.F. Lambert , M. Che , B. Didillon
DOI: 10.1016/S0920-5861(00)00589-7
关键词: Catalysis 、 Inorganic chemistry 、 Transition metal 、 Platinum 、 Tin 、 Heterogeneous catalysis 、 Catalytic reforming 、 Oxidizing agent 、 Chemistry 、 Thermal treatment
摘要: Abstract The complex [(CH3)4N]3[Pt(SnCl3)5] was selected as a molecular precursor to prepare PtSn/γc-Al2O3 reforming catalysts. spectroscopic fingerprints of the starting were obtained by 195Pt and 119Sn NMR diffuse reflectance UV–visible spectroscopy. A series supported catalysts synthesized wet impregnation alumina with solution in acetone. Well-dispersed species are for Pt loadings below 1 wt.%; at higher loadings, second is formed that has features reminiscent initial precipitates separate phase. Apparently, Pt–Sn bonds hydrolyzed low-loading preserved high-loading species. thermal transformations also studied compared those bulk precursor. In particular, it shown nature atmosphere treatment (neutral or oxidizing) can orient final catalyst towards preservation an intimate interaction, demixtion.
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