期刊
MICROPOROUS AND MESOPOROUS MATERIALS
卷 143, 期 2-3, 页码 368-374出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.micromeso.2011.03.021
关键词
Alumina-ceria-zirconia nanocomposite; Surfactant-controlled synthesis; Car exhaust; Three-way catalysis; Mesostructure
类别
资金
- National Natural Science Foundation of China [50872140, 20633090]
- The Science and Technology Commission of Shanghai [10QH1402800]
- Shanghai standard project [08DZ05020000]
A polycopolymer-assisted self-assembly process under hydrothermal condition has been developed for preparing mesostructured alumina-ceria-zirconia tri-component nanocomposite. This composite showed a uniform worm-like mesoporous structure with nanocrystallite framework, sharp pore-size distribution, high surface area (>180 m(2)/g), high thermal stability (>1000 degrees C) and excellent oxygen storage capacity (OSC). Small amounts of precious metals can be homogeneously loaded into the worm-like pore structure, which could maintain their high dispersity even when calcined at 1000 degrees C. Such a nanocomposite catalyst showed high performance for the three-way exhaust catalytic conversion with low ignition temperatures at engine start-up and high thermal stability against aging. (C) 2011 Elsevier Inc. All rights reserved.
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