脱氢
双金属片
催化作用
丙烷
纳米材料基催化剂
铂金
沸石
选择性
化学
化学工程
无机化学
材料科学
有机化学
工程类
作者
Peng Wang,Meng Yang,Huafei Liao,Kaiyang Xu,Xupeng Zong,Zailai Xie,Huibo Zhao,Yi Xu,Hua Yang,Yuyan Gan,Yuan Fang,Lizhi Wu,Yu Tang,Li Tan
标识
DOI:10.1016/j.xcrp.2023.101311
摘要
Restructuring of a heterogeneous catalyst under reaction conditions is a common phenomenon. Severe restructuring of a catalyst can result in deactivation in many catalytic systems—for example, the catalytic dehydrogenation of propane to propylene. Herein, we report the utilization of catalyst restructuring to improve activity and stability for the propane dehydrogenation reaction. A bimetallic platinum and zinc (Pt1Znm) catalyst protected by an in situ restructured silicalite-1 zeolite is prepared. The catalyst yields outstanding activity (initial conversion of ∼69.2%, initial selectivity of ∼91.1%) with high stability at 580°C, which is better than several commercial catalysts. Characterization shows the singly dispersed bimetallic sites of Pt1Znm serve as the catalytic sites during the reaction. Moreover, the less-stable silicalite-1 zeolite undergoes restructuring during the dehydrogenation reaction, forming a crucial protective layer on the Pt1Znm bimetallic nanocatalysts.
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