Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 163, Issue 2-3, Pages 835-842Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2008.07.035
Keywords
Surfactant; CuO/CeO2; Ti doping; CO oxidation
Categories
Funding
- Ministry of Science & Technology of China [2006AA06Z348]
- National Natural Science Foundation of China [20676097]
- Program of New Century Excellent Talents in Universities of China [NCET-07-0599]
- Ministry of Education [IRT0641]
- Program for Introducing Talents of Discipline to Universities of China [B06006]
Ask authors/readers for more resources
A series of CuO/Ce1-xTixO2 catalysts used for low-temperature CO oxidation were prepared by impregnation with the support derived from surfactant-assisted co-precipitation. The techniques of N-2 adsorption/desorption, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS) and temperature-programmed reduction by H-2 (H-2-TPR) were employed for catalyst characterization. It is found that the support CeO2 prepared by the surfactant-assisted method possesses much larger specific surface area than the one obtained from conventional precipitation. Doping Ti in the support with Ti/Ce atomic ratio of 1:9 or 3:7 can further increase the surface area of CeO2 and decrease its crystallite size. As a result, the active Cu species possess higher dispersion on the support Ce1-xTixO2 than on pure CeO2. The strong interaction between the dispersed Cu species and the support Ce1-xTixO2 makes the catalysts possess much higher oxidation activity and thermal stability. However, when the ratio of Ti/Ce reaches 5:5, opposite effect is found, due to the highest Surface concentration of Ti and the lack of surface highly dispersed copper species. (C) 2008 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available