Effects of ZrO2/Al2O3 properties on the catalytic activity of Pd catalysts for methane combustion and CO oxidation

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	Effects of ZrO2/Al2O3 properties on the catalytic activity of Pd catalysts for methane combustion and CO oxidation
	Niu JZ(牛建中)
刊名	Catalysis Today
	2007
卷号	126 页码:441-448
关键词	ZrO2/Al2O3 Pd catalyst CH4 combustion CO oxidation TPD Pulse reaction
ISSN号	0920-5861
通讯作者	郭耘
中文摘要	Zirconia supported on alumina was prepared and characterized by BET surface area, X-ray diffraction (XRD), X-ray photoelectron spectra (XPS), temperature programmed desorption (TPD), and pulse reaction. 0.2% Pd/ZrO2/Al2O3 catalyst were prepared by incipient wetness impregnation of supports with aqueous solution of Pd(NO3)2. The effects of support properties on catalytic activity for methane combustion and CO oxidation were investigated. The results show that ZrO2 is highly dispersed on the surface of Al2O3 up to 10 wt.% ZrO2, beyond this value tetragonal ZrO2 is formed. The presence of a small amount of ZrO2 can increase the surface area, pore volume and acidity of support. CO–TPD results show that the increase of CO adsorption capacity and the activation of C O bond after the presence of ZrO2 lead to the increase of catalytic activity of Pd catalyst for CO oxidation. CO pulse reaction results indicate that the lattice oxygen of support can be activated at lower temperature following the presence of ZrO2, but it does not accelerate the activity of 0.2% Pd/ZrO2/Al2O3 for methane combustion. 0.2% Pd/ZrO2/Al2O3 dried at 120 8C shows highest activity for CH4 combustion, and the activity can be further enhanced following the repeat run. The increase of treatment temperature and pre-reduction can decrease the activity of catalyst for CH4 combustion.
学科主题	物理化学
收录类别	SCI
资助信息	National Basic Research Program of China (2004CB719500);National Natural Science Foundation of China (20601008);Shanghai Rising-Star Program (05QMX1415);Nanotechnology Developing Fund (0452nm005) by The Commission of Science and Technology of Shanghai Municipality
语种	英语
WOS记录号	WOS:000249239200027
公开日期	2012-11-26
内容类型	期刊论文
源URL	[http://210.77.64.217/handle/362003/2232]
专题	兰州化学物理研究所_OSSO国家重点实验室
推荐引用方式 GB/T 7714	Niu JZ. Effects of ZrO2/Al2O3 properties on the catalytic activity of Pd catalysts for methane combustion and CO oxidation[J]. Catalysis Today,2007,126:441-448.
APA	牛建中.(2007).Effects of ZrO2/Al2O3 properties on the catalytic activity of Pd catalysts for methane combustion and CO oxidation.Catalysis Today,126,441-448.
MLA	牛建中."Effects of ZrO2/Al2O3 properties on the catalytic activity of Pd catalysts for methane combustion and CO oxidation".Catalysis Today 126(2007):441-448.