Propane Dehydrogenation over Pt Clusters Localized at the Sn Single-Site in Zeolite Framework

Catalytic dehydrogenation of propane over Pt based catalyst to propylene has received considerable interests in recent years, because this route is able to provide an economical and efficient way to fill the gap between supply and demand in propylene market. The low dispersion of Pt particle at the support surface and sintering of Pt nanoparticles under the harsh reaction condition are the main challenges in the practical application of this catalyst. Herein, highly efficient Pt/Sn-Beta catalysts are developed for propane dehydrogenation, which exhibits high activity, selectivity and stability in this reaction. Full characterizations with XRD, STEM, XPS, CO-IR, H2-TPR and Py-IR techniques on these catalysts reveal that the Pt clusters are localized at the Sn single-site in the zeolitic framework, which allows the generated Pt clusters to be homogeneously dispersed at the surface zeolite. The high performance of Pt/Sn-Beta catalysts under the high reaction temperature is mainly due to a strong interaction ...