Catalytic oxidation of toluene over Pd/Co3AlO catalysts derived from hydrotalcite-like compounds: Effects of preparation methods

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境化学与生态毒理学国家重点实验室

	Catalytic oxidation of toluene over Pd/Co3AlO catalysts derived from hydrotalcite-like compounds: Effects of preparation methods
	Li, Peng ; He, Chi ; Cheng, Jie ; Ma, Chun Yan ; Dou, Bao Juan ; Hao, Zheng Ping
刊名	APPLIED CATALYSIS B-ENVIRONMENTAL
	2011-01-14
卷号	101 期号:40972 页码:570—579
中文摘要	A series of novel Pd/CO3AlO catalysts derived from hydrotalcite-like compounds (HTlcs) have been prepared and investigated for total oxidation of toluene. The HTlcs phase Co-Al precursors were prepared by coprecipitation method and Pd active species were introduced by different approaches, i.e., impregnation (IMP), wet ion exchange (WIE) or directly at coprecipitation stage (COP). It is found that all hydrotalcitederived Pd/CO3AlO catalysts are much more active than the Pd/CO3AlO catalyst prepared via traditional thermal combustion method (TCB) in toluene elimination. The activities of all synthesized catalysts obey the following sequence: Pd/CO3AlO (COP) > Pd/CO3AlO (WIE) >= Pd/CO3AlO (IMP) > Pd/CO3AlO (TCB). Excellent catalytic activities of the novel hydrotalicite-derived Pd/CO3AlO catalysts could be contributed to their high surface area, small mean crystallized size of support and highly dispersed PdO particles. Besides, they are well positively associated with catalyst reducibilities and the amounts of oxygen vacancies. According to the XPS. TEM and TPR results, it was found that the strong synergistic effect between Co3O4 and PdO, but not the amount of the surface palladium species which are generally believed to be the active sites, is the main factors determining the catalytic activity in this work. The stability tests indicate that all Pd/CO3AlO catalysts have no obvious deactivation, and some catalysts even show improved activities during the reaction process due to the emergence of metal Pd. (C) 2010 Elsevier B.V. All rights reserved.
WOS记录号	WOS:000287068400047
公开日期	2012-10-18
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/7074]
专题	生态环境研究中心_环境化学与生态毒理学国家重点实验室
推荐引用方式 GB/T 7714	Li, Peng,He, Chi,Cheng, Jie,et al. Catalytic oxidation of toluene over Pd/Co3AlO catalysts derived from hydrotalcite-like compounds: Effects of preparation methods[J]. APPLIED CATALYSIS B-ENVIRONMENTAL,2011,101(40972):570—579.
APA	Li, Peng,He, Chi,Cheng, Jie,Ma, Chun Yan,Dou, Bao Juan,&Hao, Zheng Ping.(2011).Catalytic oxidation of toluene over Pd/Co3AlO catalysts derived from hydrotalcite-like compounds: Effects of preparation methods.APPLIED CATALYSIS B-ENVIRONMENTAL,101(40972),570—579.
MLA	Li, Peng,et al."Catalytic oxidation of toluene over Pd/Co3AlO catalysts derived from hydrotalcite-like compounds: Effects of preparation methods".APPLIED CATALYSIS B-ENVIRONMENTAL 101.40972(2011):570—579.