Effects of pretreatment conditions on the catalytic performance of Au/ZnO catalysts for CO oxidation

	Effects of pretreatment conditions on the catalytic performance of Au/ZnO catalysts for CO oxidation
	Shao Jian-Jun ; Zhang Ping ; Song Wei ; Huang Xiu-Min ; Xu Yi-De ; Shen Wen-Jie
刊名	acta chimica sinica
	2007-09-28
卷号	65 期号:18 页码:2007-2013
关键词	Au/ZnO CO oxidation calcination temperature pretreatment
英文摘要	au/zno catalysts were prepared by the deposition-precipitation (dp) method. effects of calcination temperature and pretreatment conditions on the structure and the catalytic performance of au/zno catalysts were investigated for co oxidation. for the samples calcined in 533 similar to 773 k, no diffraction peak of gold species could be detected by xrd measurement. transmission electron microscopy (tem) observation revealed that the particle sizes of gold were 2.7, 3.5 and 3.7 nm respectively, for the catalysts calcined at 533, 673 and 773 k. temperature-programmed reduction (h-2-tpr) measurements further indicated that the pre-reduced gold species could be reoxidized at room temperature and the redox property of the catalyst could be enhanced through pretreatment with flowing air. however, its high redox properties still remained after several redox cycles. the result of co oxidation on the catalytic behavior of the au/zno catalysts was strongly influenced by the particle size and the surface area of the catalyst. the highly dispersed au/zno catalyst with larger surface area and the least particle size can be prepared by the deposition-precipitation calcined at 533 k, resulting in the most promising activity and stability for co oxidation. 95% co conversion could be achieved after 300 h time-on-stream even though the feed gas contained 3.1 vol.% of water vapor.
WOS标题词	science & technology ; physical sciences
类目[WOS]	chemistry, multidisciplinary
研究领域[WOS]	chemistry
关键词[WOS]	low-temperature oxidation ; supported au catalysts ; carbon-monoxide ; gold catalysts ; ambient-temperature ; au/zro2 catalyst ; room-temperature ; zirconia ; deactivation ; au/al2o3
收录类别	SCI
语种	英语
WOS记录号	WOS:000249931300014
公开日期	2015-11-17
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/140490]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
作者单位	1.Acad Armored Force Engn, Natl Key Lab Remfg, Beijing 100072, Peoples R China 2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	Shao Jian-Jun,Zhang Ping,Song Wei,et al. Effects of pretreatment conditions on the catalytic performance of Au/ZnO catalysts for CO oxidation[J]. acta chimica sinica,2007,65(18):2007-2013.
APA	Shao Jian-Jun,Zhang Ping,Song Wei,Huang Xiu-Min,Xu Yi-De,&Shen Wen-Jie.(2007).Effects of pretreatment conditions on the catalytic performance of Au/ZnO catalysts for CO oxidation.acta chimica sinica,65(18),2007-2013.
MLA	Shao Jian-Jun,et al."Effects of pretreatment conditions on the catalytic performance of Au/ZnO catalysts for CO oxidation".acta chimica sinica 65.18(2007):2007-2013.