Shape-selective synthesis and oxygen storage behavior of ceria   nanopolyhedra, nanorods, and nanocubes

doi:10.1021/jp055584b

CORC > 北京大学 > 化学与分子工程学院

	Shape-selective synthesis and oxygen storage behavior of ceria nanopolyhedra, nanorods, and nanocubes
	Mai, HX ; Sun, LD ; Zhang, YW ; Si, R ; Feng, W ; Zhang, HP ; Liu, HC ; Yan, CH
刊名	journal of physical chemistry b
	2005
关键词	HYDROTHERMAL SYNTHESIS OXIDE NANOPARTICLES CERIUM(IV) OXIDE CEO2 NANOWIRES ULTRAVIOLET-ABSORPTION COLLOIDAL SOLUTION 3-WAY CATALYSIS CO CONVERSION NANOCRYSTALS SIZE
DOI	10.1021/jp055584b
英文摘要	Single-crystalline and uniform nanopolyhedra, nanorods, and nanocubes of cubic CeO2 were selectively prepared by a hydrothermal method at temperatures in the range of 100-180 degrees C under different NaOH concentrations, using Ce(NO3)(3) as the cerium source. According to high-resolution transmission electron microscopy, they have different exposed crystal planes: {111} and {100} for polyhedra, {110} and {100} for rods, and {100} for cubes. During the synthesis, the formation of hexagonal Ce(OH)(3) intermediate species and their transformation into CeO2 at elevated temperature, together with the base concentration, have been demonstrated as the key factors responsible for the shape evolution. Oxygen storage capacity (OSC) measurements at. 400 degrees C revealed that the oxygen storage takes place both at the surface and in the bulk for the as-obtained CeO2 nanorods and nanocubes, but is restricted at the surface for the nanopolyhedra just like the bulk one, because the {100}/{110}-dominated surface structures are more reactive for CO oxidation than the {111}-dominated one. This result suggests that high OSC materials might be designed and obtained by shape-selective synthetic strategy.; Chemistry, Physical; SCI(E); EI; PubMed; 398; ARTICLE; 51; 24380-24385; 109
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/346158]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Mai, HX,Sun, LD,Zhang, YW,et al. Shape-selective synthesis and oxygen storage behavior of ceria nanopolyhedra, nanorods, and nanocubes[J]. journal of physical chemistry b,2005.
APA	Mai, HX.,Sun, LD.,Zhang, YW.,Si, R.,Feng, W.,...&Yan, CH.(2005).Shape-selective synthesis and oxygen storage behavior of ceria nanopolyhedra, nanorods, and nanocubes.journal of physical chemistry b.
MLA	Mai, HX,et al."Shape-selective synthesis and oxygen storage behavior of ceria nanopolyhedra, nanorods, and nanocubes".journal of physical chemistry b (2005).