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Meso/Macroporous Ceria with Enhanced Surface Oxygen Activity via Plant-Leaf Mineralization


  • Y. Masuda—contributing editor

  • The authors would like to thank the consistent financial supports from National Natural Science Foundation of China (no.50972090), Dawn Program of Shanghai Education Commission (no.08SG15), Major Fundamental Research Project of Shanghai Science Committee (no.07DJ14001), National Basic Research Program of China (no.2006CB601200), Sino-Finland International Program of Shanghai (no.09520703400), Sino-France International Program of MOST, China (no.2009DFA52410), and the Foundation of Key Laboratory for Liquid–Solid Structural Evolution and Processing of Materials (Ministry of Education), Shandong University.

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Biomorphic cerias were produced through mineralizing plant-leaf templates (camphor and common oleander) with a cerium nitrate precursor. They were mesoporous while inheriting the species-dependent macrofeatures of plant-leaf templates, like macropores, channels, and microfibrous clusters, to have a meso/macroporous hierarchy. Surface oxygen activity was enhanced for the biomorphic cerias, as was revealed by temperature-programmed reduction measurements, suggesting their potentials in mid-temperature (300°–600°C) applications of oxygen storage, catalysis, gas sensing, etc.

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