期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 1, 期 3, 页码 728-734出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2ta00504b
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资金
- National Basic Research Program of China [2009CB939704]
- National Natural Science Foundation of China [21273169]
- Innovative Research Team Project of Hubei Province [2010CDA070]
- Fundamental Research Funds for the Central Universities
Unique mesoporous microcuboid CeO2 crystals were prepared by a facile method, involving the hydrothermal hydrolysis of a Ce(NO3)(3) aqueous solution in the presence of urea at 180 degrees C followed by calcination at 400 degrees C, and characterized with XRD, SEM, TEM, BET, Raman, XPS, positron annihilation spectroscopy and TPR. It was found for the first time that the presence of densely populated mesopores in the microcuboid CeO2 crystals results in highly reactive surface lattice oxygen due to the exposure of the mesopore wall surface with high interfacial curvature, thus leading to a significant enhancement in catalytic activity as compared to single crystal CeO2 nanocubes without mesopores.
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