Bimetallic Pt-Sn nanocluster from the hydrogenolysis of a well-defined surface compound consisting of [([tbnd]AlO–)Pt(COD)Me] and [([tbnd]AlO–)SnPh3] fragments for propane dehydrogenation

Zhikang Xu, Rui Xu, Yuanyuan Yue, Pei Yuan, Xiaojun Bao, Edy Abou-Hamad, Jean-Marie Basset, Haibo Zhu

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37 Scopus citations

Abstract

The bimetallic Pt-Sn catalysts are known to be the most efficient ones for propane dehydrogenation reaction; however, the synthesis of bimetallic Pt-Sn nanocluster (below 1 nm) with an alloy structure still remains a formidable challenge. An approach for the controllable synthesis of Pt-Sn nanocluster based on Surface Organometallic Chemistry on oxide concept is developed here, which involves two basic steps: the sequential grafting of Pt(COD)Me2 and HSnPh3 at the surface of dehydroxylated θ-Al2O leading to the formation of well-defined bimetallic surface compound consisting of [([tbnd]AlO–)Pt(COD)Me] and [([tbnd]AlO–)SnPh3] fragments, and the hydrogenolysis of this surface compound under a mild condition giving rise to the ultra-small bimetallic Pt-Sn cluster around 0.75 nm. The achieved Pt-Sn/θ-Al2O3 catalysts exhibit high activity, selectivity and stability in propane dehydrogenation to propylene.
Original languageEnglish (US)
Pages (from-to)391-400
Number of pages10
JournalJournal of Catalysis
Volume374
DOIs
StatePublished - May 27 2019

Bibliographical note

KAUST Repository Item: Exported on 2020-10-01
Acknowledgements: Financial supports from the National Natural Science Foundation of China (Grant 21606048, 21878050) and 111 Project (Project No. D17005) are gratefully acknowledged. We also appreciate Sasol company for their kindly providing different kinds of AlO supports.

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