Novel NO trapping catalysts derived from Co-Mg/X-Al (X = Fe, Mn, Zr, La) hydrotalcite-like compounds

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	Novel NO trapping catalysts derived from Co-Mg/X-Al (X = Fe, Mn, Zr, La) hydrotalcite-like compounds
	Yu, Jun Jie; Tao, Yan Xin; Liu, Chang Chun; Hao, Zheng Ping; Xu, Zhi Ping
刊名	ENVIRONMENTAL SCIENCE & TECHNOLOGY
	2007-02-15
卷号	41 期号:4 页码:1399-1404
英文摘要	Co2.5Mg0.5/Al-1 and Co2.5Mg0.5/X0.5Al0.5 hydrotalcite-like compounds (where X = Fe, Mn, Zr, La) were synthesized by a constant-pH coprecipitation. The derived oxides from hydrotalcites upon calcination at 800 degrees C for 4 h in static air are mainly of spinel phase, with a surface area of 14.2-23.8 m(2)/g, where new phase ZrO2 and La2O3 are segregated in Zr- and La-containing oxides, respectively. Incorporation of the fourth element has assisted the reduction of transition-metal cations in the oxide catalysts, which may lead to the enhancement of the NO storage capacity in O-2 at 100 degrees C for all catalysts. However, at 300 degrees C, only Zr- and La-containing catalysts improve the NO storage performance. Substantially, La-containing catalyst excels over all other catalysts in NO storage capability both at 100 and 300 degrees C. More remarkably, the NO storage at 300 degrees C (7.56 mg/g) is much higher than that at 100 degrees C (4.69 mg/g). NO adsorption/desorption routes have been proposed to explain the NO storage, the NO-to-NO2 conversion, and the reduction (decomposition) of NO to N2O/N-2 in O-2 on the catalysts. In addition, the negative influences of CO2 or H2O on the NO storage/reduction have been further revealed in this research.
WOS记录号	WOS:000244161600054
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/22524]
专题	生态环境研究中心_环境纳米材料实验室
推荐引用方式 GB/T 7714	Yu, Jun Jie,Tao, Yan Xin,Liu, Chang Chun,et al. Novel NO trapping catalysts derived from Co-Mg/X-Al (X = Fe, Mn, Zr, La) hydrotalcite-like compounds[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2007,41(4):1399-1404.
APA	Yu, Jun Jie,Tao, Yan Xin,Liu, Chang Chun,Hao, Zheng Ping,&Xu, Zhi Ping.(2007).Novel NO trapping catalysts derived from Co-Mg/X-Al (X = Fe, Mn, Zr, La) hydrotalcite-like compounds.ENVIRONMENTAL SCIENCE & TECHNOLOGY,41(4),1399-1404.
MLA	Yu, Jun Jie,et al."Novel NO trapping catalysts derived from Co-Mg/X-Al (X = Fe, Mn, Zr, La) hydrotalcite-like compounds".ENVIRONMENTAL SCIENCE & TECHNOLOGY 41.4(2007):1399-1404.