期刊
RSC ADVANCES
卷 5, 期 36, 页码 28305-28315出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ra01480h
关键词
-
资金
- National Basic Research Program of China [2012CB215002]
- Natural Science Foundation of China [21177160, 21376261, 21303263, 21173270]
- Beijing Natural Science Foundation [2142027]
- Doctor select Foundation [20130007110007, 20130007120011]
A series of PtSn/SBA-15 catalysts with differentmetal loading amounts were prepared by an incipient-wetness impregnation method and their catalytic performances were tested for propane dehydrogenation. The catalysts were characterized by means of XRD, BET, TEM, UV-Vis DRS, O-2-TPO, H-2-TPR, XPS and Raman spectroscopy. The catalytic activity for propane dehydrogenation increases with an increase in the loading amount of metal, and it remained stable when the Pt loading amount reached 1 wt%. It is found that the state of Pt or Sn in the catalysts varies with changes in metal loading. When the loading of Pt and Sn exceed a certain amount (Pt 1 wt% and Sn 2 wt%), the state of Pt and Sn changes apparently with the more oxidative Pt and more reduced Sn. The changes of the state of Pt and Sn influence the catalytic performance of these catalysts. Moreover, the size of the PtSn nanoparticles increases with increasing amounts of Pt and Sn, which also results in a change in the catalytic performance. The Pt1Sn2/SBA-15 catalyst shows the highest initial activity, which results from an increased amount of active sites, the high dispersion of PtSn nanoparticles and the favorable state of the Pt and Sn species.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据