期刊
APPLIED CATALYSIS A-GENERAL
卷 381, 期 1-2, 页码 261-266出版社
ELSEVIER
DOI: 10.1016/j.apcata.2010.04.020
关键词
Mn doping; CuO-CeO2 catalysts; Selective oxidation of CO; Hydrogen-rich streams; Oxygen vacancies
资金
- Ministry of Science and Technology of China [2004 CB 719504]
CuO-CeO2 catalysts with different amounts of Mn doping were prepared by a hydrothermal method and were investigated by means of X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET), temperature-programmed reduction (H-2-TPR), X-ray photoelectron spectroscopy (XPS) and UV-Raman. The results show that MnOx-CuO-CeO2 catalyst with Mn:Cu =1:5 exhibits the best catalytic activity and the broadest operating temperature window for the high conversion (CO conversion >99.0%, 110-140 degrees C) in the selective oxidation of CO in hydrogen-rich streams. Doping an appropriate amount of Mn in CuO-CeO2 catalyst is beneficial to the formation of a more stable solid solution with a larger surface area and smaller particle size, and the redox properties of the catalysts are also enhanced, which improves the selective oxidation performance of CO in hydrogen-rich streams. Crown (C) 2010 Published by Elsevier B.V. All rights reserved.
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