期刊
JOURNAL OF CATALYSIS
卷 374, 期 -, 页码 391-400出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcat.2019.04.035
关键词
Propane dehydrogenation; Bimetallic catalyst; Propylene production; Surface organometallic chemistry
资金
- National Natural Science Foundation of China [21606048, 21878050]
- 111 Project [D17005, Al2O3]
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)Me-2 and HSnPh3 at the surface of dehydroxylated theta-Al2O leading to the formation of well-defined bimetallic surface compound consisting of [( AlO-)Pt(COD)Me] and [(=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/theta-Al2O3 catalysts exhibit high activity, selectivity and stability in propane dehydrogenation to propylene. (C) 2019 Elsevier Inc. All rights reserved.
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