One-step preparation of Pt–Ce and Pt–Sn–Ce/Al2O3 catalysts by flame spray pyrolysis in propane dehydrogenation
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Nanocrystalline Pt–Ce/Al2O3 and Pt–Sn–Ce/Al2O3 catalysts with various Ce loading contents have been prepared by one-step flame spray pyrolysis (FSP). The resulting nanopowders consisted of spherical single-crystalline γ-alumina particles with as-prepared primary particle size of 8–10 nm. The N2 physisorption results revealed that all the flame-made catalysts contained only the macropore structure. The catalytic properties of the FSP-made catalysts were investigated in the dehydrogenation of propane. The results show that the Ce addition could greatly improve the catalytic performance and catalytic stability of the Pt–Ce/Al2O3 and Pt–Sn–Ce/γ-Al2O3 and optimal Ce loading contents was 1 wt%. This could be due to better Pt dispersion and change in metal/support interaction after Ce loading.
KeywordsFlame spray pyrolysis Pt–Sn–Ce/Al2O3 Propane dehydrogenation Doping
Financial supports from the The Ratchadaphiseksomphot Endowment Fund of Chulalongkorn University (Advanced Materials Cluster) are gratefully acknowledged.
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