期刊
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
卷 17, 期 7, 页码 5133-5140出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4cp05449k
关键词
-
资金
- National Natural Science Foundation of China [21203091]
- Natural Science Foundation of Jiangsu Province [BK2012298]
Metal-support interactions between Au and TiO2 are studied based on Au/TiO2 catalysts with different TiO2 crystal planes exposed. With ex situ XPS, TEM and in situ DRIFTS, we have investigated the crystal-plane-dependent metal-support interaction effects on the physiochemical properties of Au/TiO2 catalysts. Based on the structural characterization and spectroscopic results, we can observe chemical oscillations (including the electronic structures of Au nanoparticles and the interaction between Au/TiO2 catalysts and CO molecules) during alternate H-2 and O-2 pre-treatments. Their variation tendencies of oscillations are greatly dependent on the crystal planes of TiO2 and the pre-treatment temperature. Furthermore, their surface and electronic changes after H-2 and O-2 pre-treatments can be well correlated with their catalytic activities in CO oxidation. Electron-transfer processes across the Au-TiO2 interface are proved to be the origin accounting for their changes after H-2 and O-2 pre-treatments. The different electronic structures of different TiO2 crystal planes should have relationships with the crystal-plane-dependent metal-support interaction effects in Au/TiO2.
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