Effect of reduction method on the activity of Pt–Sn/SiO 2 for dehydrogenation of propane
Catalysis Today, ISSN: 0920-5861, Vol: 232, Page: 33-39
2014
- 58Citations
- 57Captures
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Article Description
The effect of reduction method (direct reduction ( DR ), decomposition in inert gas ( DI ) and calcination-reduction ( CR )) on the catalytic performances of Pt–Sn/SiO 2 catalyst in the dehydrogenation of propane was investigated. The Pt–Sn/SiO 2 ( DR ) showed the highest activity among the catalysts tested. The order of activities of Pt/SiO 2 and Pt–Sn/SiO 2 catalysts was Pt/SiO 2 ( DR ) ≦ Pt–Sn/SiO 2 ( CR ) < Pt–Sn/SiO 2 ( DI ) < Pt–Sn/SiO 2 ( DR ). The results of structural characterization by X-ray diffraction (XRD), CO pulse, transmission electron microscopy (TEM), and Pt L III and Sn K-edges X-ray absorption fine structure (XAFS) spectroscopy indicated that Pt 3 Sn alloy nanoparticle was mainly formed on the Pt–Sn/SiO 2 ( DR ). In the case of the Pt–Sn/SiO 2 ( CR ) catalyst, PtSn alloy particle was mainly dispersed on SiO 2. On the other hand, Pt metal particles and highly dispersed SnO 2 were present on the Pt–Sn/SiO 2 ( DI ). The relationship between activity and structure of platinum-tin catalysts suggested that Pt 3 Sn alloy acts as active site for dehydrogenation of propane, whereas PtSn alloy shows low or no activity.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0920586113005506; http://dx.doi.org/10.1016/j.cattod.2013.10.064; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84901229241&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/S0920586113005506; https://dx.doi.org/10.1016/j.cattod.2013.10.064
Elsevier BV
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