Abstract
This paper described an investigation on catalytic properties of Pt nanoparticles supported on hydrotalcite-like oxide (MgAl(Sn)O) calcinated by microwave for cyclohexane dehydrogenation to cyclohexene. The PtSn catalysts were investigated with several state-of-art characterizations such as BET, XRD, NH3-TPD, H2-TPR, H2-TPD and XPS. Particular emphasis was focused on the changes in the Sn-support interaction and in the character of Pt active sites. H2-TPR showed that the microwave calcination strengthened the interaction between Sn and support. The strengthened interaction could maintain more amounts of Sn in oxidized. H2-TPD revealed that microwave calcination facilitated Sn in changing the interfacial character between Pt and support. This was beneficial for the migration of carbonaceous materials to the support. These effects resulted in higher activity and stability in cyclohexane dehydrogenation to cyclohexene.
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