Shape dependence of nanoceria on complete catalytic oxidation of o-xylene

doi:10.1039/c6cy00180g

CORC > 高能物理研究所 > 中国科学院高能物理研究所 > 核技术应用研究中心

	Shape dependence of nanoceria on complete catalytic oxidation of o-xylene
	Zhang, Y; Wang BY(王宝义); Qin XB(秦秀波); Wang, BY; Qin, XB; He, H; Yu, YB; Wang, YF; Wang, L
刊名	CATALYSIS SCIENCE & TECHNOLOGY
	2016
卷号	6 期号:13 页码:4840
DOI	10.1039/c6cy00180g
英文摘要	BTX (benzene, toluene, and xylene) in atmosphere, mainly emitted from various industrial processes and transportation activities, are of particular concern due to their potentially highly toxic effects on human health. Catalytic oxidation of o-xylene was investigated on nanosized CeO2 particles, cubes, and rods, among which rods show the highest activity, which is comparable with those of traditional noble-metal catalysts. CeO2 nanorods also exhibit long durability for o-xylene oxidation, without deactivation during a 50 h time-on stream test. Over the CeO2 rods and particles, the presence of water vapor slightly decreased o-xylene conversion, while water vapor enhanced o-xylene oxidation on the CeO2 cubes. High-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, positron annihilation spectroscopy, and O-2 temperature-programmed desorption measurements revealed that ceria rods enclosed by (111) and (100) facets exhibit the highest concentration of oxygen vacancy clusters (VCs), the presence of which promoted the adsorption of molecular oxygen. The lower the temperature for desorption of chemisorbed O-2 species is, the higher is the activity for o-xylene oxidation, identifying the key role of VCs in t(h)is reaction via the activation of molecular oxygen over nanoceria. The finding may also be fundamental for designing ceria-based catalysts with better performance for catalytic oxidation of volatile organic compounds.
WOS记录号	WOS:000378734700024
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/260508]
专题	高能物理研究所_核技术应用研究中心
作者单位	中国科学院高能物理研究所
推荐引用方式 GB/T 7714	Zhang, Y,Wang BY,Qin XB,et al. Shape dependence of nanoceria on complete catalytic oxidation of o-xylene[J]. CATALYSIS SCIENCE & TECHNOLOGY,2016,6(13):4840.
APA	Zhang, Y.,王宝义.,秦秀波.,Wang, BY.,Qin, XB.,...&Wang, L.(2016).Shape dependence of nanoceria on complete catalytic oxidation of o-xylene.CATALYSIS SCIENCE & TECHNOLOGY,6(13),4840.
MLA	Zhang, Y,et al."Shape dependence of nanoceria on complete catalytic oxidation of o-xylene".CATALYSIS SCIENCE & TECHNOLOGY 6.13(2016):4840.