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Journal of Chemistry
Volume 2015, Article ID 254750, 11 pages
http://dx.doi.org/10.1155/2015/254750
Research Article

Flower-Like Mn-Doped CeO2 Microstructures: Synthesis, Characterizations, and Catalytic Properties

1Key Laboratory of Coal-Based CO2 Capture and Geological Storage of Jiangsu Province, China University of Mining and Technology, Xuzhou 221008, China
2Low Carbon Energy Institute, China University of Mining and Technology, Xuzhou 221008, China
3School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, China

Received 14 September 2015; Revised 18 November 2015; Accepted 22 November 2015

Academic Editor: Hossein Kazemian

Copyright © 2015 Ling Liu et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Mn-doped CeO2 flower-like microstructures have been synthesized by a facile method, involving the precipitation of metallic alkoxide precursor in a polyol process from the reaction of CeCl3·7H2O with ethylene glycol in the presence of urea followed by calcination. By introducing manganese ions, the composition can be freely manipulated. To investigate whether there was a hybrid synergic effect in CH4 combustion reaction, further detailed characteristics of Mn-doped CeO2 with various manganese contents were revealed by XRD, Raman, FT-IR, SEM, EDS, XPS, OSC, H2-TPR, and N2 adsorption-desorption measurements. The doping manganese is demonstrated to increase the storage of oxygen vacancy for CH4 and enhance the redox capability, which can efficiently convert CH4 to CO2 and H2O under oxygen-rich condition. The excellent catalytic performance of MCO-3 sample, which was obtained with the starting Mn/Ce ratios of 0.2 in the initial reactant compositions, is associated with the larger surface area and richer surface active oxygen species.