Synthesis of Pt–Sn nanoalloy catalysts with enhanced performance in the dehydrogenation of propane

Micro & nano letters

article

Zhanhua Ma¹  Aijing Jiang¹  Shuai Li¹  Jun Li¹  Lanyi Sun¹  Changhua An² 

[1] State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum (East China);Tianjin Key Laboratory of Organic Solar Cells and Photochemical Conversion College of Chemistry and Chemical Engineering, School of Chemistry and Chemical Engineering, Tianjin University of Technology

关键词: particle size;    scanning electron microscopy;    differential thermal analysis;    transmission electron microscopy;    nanoparticles;    X-ray diffraction;    adsorption;    desorption;    catalysis;    catalysts;    platinum alloys;    nanofabrication;    tin alloys;    propylene selectivity;    thermogravimetric analysis method;    differential thermal analysis method;    carbonylation–impregnation method;    transmission electron microscope;    Pt–Sn nanoparticles;    propane dehydrogenation reaction;    nitrogen adsorption-desorption;    particle size distribution;    catalytic properties;    platinum-tin nanoalloy catalyst;    X-ray diffraction;    PtSn;   

DOI  :  10.1049/mnl.2018.5024

学科分类：计算机科学（综合）

来源: Wiley

【 摘 要 】

Platinum–tin (Pt–Sn) nanoalloy catalyst supported on Al 2 O 3 was prepared by carbonylation–impregnation method. The catalyst was characterised by means of nitrogen adsorption–desorption, X-ray diffraction and transmission electron microscope, showing the existence of Pt and Sn as Pt 3 Sn alloy. The analysis of particle size distribution revealed that Pt–Sn nanoparticles have high dispersion and narrow particle size distribution with an average diameter of 1.7 ± 0.4 nm. Its catalytic performance toward propane dehydrogenation was also investigated. The propane dehydrogenation reaction showed that the as-prepared Pt–Sn/Al 2 O 3 catalyst exhibited good dehydrogenation performance with the conversion of 27.1% and propylene selectivity of 93.3% after reacting 12 h owing to the close interaction between Pt and Sn components. Coke deposition of the used catalyst was characterised by thermogravimetric and differential thermal analysis method, revealing most of the carbon was on the surface of the support, which meant that more active sites to be accessible to maintain catalytic stability.

【 授权许可】

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