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	Promotion effect of residual K on the decomposition of N2O over cobalt-cerium mixed oxide catalyst
	Xue, Li; Zhang, Changbin; He, Hong; Teraoka, Yasutake
	2007
会议名称	2nd Japan-China Workshop on Environmental Catalysis and Eco- Materials
会议日期	OCT 23-25, 2005
会议地点	Fukuoka, JAPAN
关键词	NO decomposition Co3O4 CeO mixed oxide co-precipitation O-2-TPD H-2-TPR redox ability K2CO3 residual K
英文摘要	A series of cobalt-cerium mixed oxide catalysts (CO3O4-CeO2) with a Ce/Co molar ratio of 0.05 were prepared by co-precipitation (with K2CO3 and KOH as the respective precipitant), impregnation, citrate, and direct evaporation methods and then tested for the catalytic decomposition of N2O. XRD. BET, XPS, O-2-TPD and H-2-TPR methods were used to characterize the catalysts. Catalysts with a trace amount of residual K exhibited higher catalytic activities than those without. The presence of appropriate amount of K in Co3O4-CeO2 may improve the redox property of CO3O4, which is important for the decomposition of NO. When the amount of K was constant, the surface area became the most important factor for the reaction. The co-precipitation-prepared catalyst with KCO3 as precipitant exhibited the best catalytic performance because of the presence of ca. 2 mol% residual K and the high surface area. We also discussed the rate-determining step of the N,O decomposition reaction over these CO3O4-CeO2 catalysts. (c) 2007 Elsevier B.V. All rights reserved.
ISSN号	0920-5861
内容类型	会议论文
源URL	[http://ir.rcees.ac.cn/handle/311016/24726]
专题	生态环境研究中心_大气环境科学实验室
推荐引用方式 GB/T 7714	Xue, Li,Zhang, Changbin,He, Hong,et al. Promotion effect of residual K on the decomposition of N2O over cobalt-cerium mixed oxide catalyst[C]. 见:2nd Japan-China Workshop on Environmental Catalysis and Eco- Materials. Fukuoka, JAPAN. OCT 23-25, 2005.

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