Pt-Cu Alloy Nanoparticles Encapsulated in Silicalite-1 Molecular Sieve: Coke-Resistant Catalyst for Alkane Dehydrogenation

被引：28

作者：

Zhang, Xiaotong ^{[1
]}

He, Ning ^{[1
]}

Liu, Chunyan ^{[1
]}

Guo, Hongchen ^{[1
]}

机构：

[1] Dalian Univ Technol, Dept Catalyt Chem & Engn, State Key Lab Fine Chem, Dalian 116024, Liaoning, Peoples R China

来源：

CATALYSIS LETTERS | 2019年 / 149卷 / 04期

关键词：

Pt-Cu alloys; Silicalite-1; Coke-resistant catalyst; Alkanes dehydrogenation; Core-shell structure; X-RAY PHOTOELECTRON; PLATINUM CLUSTERS; METAL-CLUSTERS; COPPER; ADSORPTION; PARTICLES; ZEOLITE; STATE; FTIR; HYDROGENATION;

D O I：

10.1007/s10562-019-02671-4

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Highly dispersed Pt-Cu alloy nanoparticles encapsulated in silicalite-1 were prepared by one-pot method. Taking propane dehydrogenation as a probe reaction, it was found that anti-coke ability was improved by encapsulation. Through H-2-TPR, CO adsorption DRIFT spectra and X-ray Photoelectron Spectroscopy experiment, enhanced anti-coke ability was ascribed to the electronic environment change of encapsulated metal. And it was further confirmed by in situ coking experiment. Owning to limited acidity, metal encapsulated by silicalite-1 molecular sieve exhibited better anti-coke ability and higher propylene selectivity than that by stronger acidic ZSM-5 molecular sieve. Moreover it was found that the combination of Cu and Pt made better catalytic performance and accelerated dehydrogenation more effectively compared with monometallic catalysts. Therefore, Pt-Cu alloy nanoparticles encapsulated in silicalite-1 molecular sieve core-shell material was a potential coke-resistant catalyst for alkane dehydrogenation reaction.

引用

页码：974 / 984

页数：11

共 40 条

[1] Silicalite-1 As Efficient Catalyst for Production of Propene from 1-Butene [J].