A molecular insight into propylene epoxidation on Cu/SiO2 catalysts using O-2 as oxidant

	A molecular insight into propylene epoxidation on Cu/SiO2 catalysts using O-2 as oxidant
	Su, Weiguang; Wang, Shouguo; Ying, Pinliang; Feng, Zhaochi; Li, Can
刊名	journal of catalysis
	2009-11-15
卷号	268 期号:1 页码:165-174
关键词	C3H6 epoxidation Cu/SiO2 Propylene oxide IR spectroscopy Cu-0 or Cu+ species Potassium acetate (KAc) modification
英文摘要	we investigated the catalytic performances of cu/sio2 with various promoters on the epoxidation of c3h6 by o-2. propylene oxide (po) is the only product at reaction temperatures below 500 k and the rate of po formation can reach 2.5 mmol g(-1) h(-1) over the potassium acetate (kac)-cu/sio2 catalyst. ir studies show that both cu-0 and cu+ in cu/sio2 can activate the c=c bond of c3h6, and pi donation of c3h6 to cu-0 or cu+ also results in a red shift of v(co) with respect to co adsorbed on cu-0 or cu+ "solo". however, c3h6 is only weakly adsorbed on cu2+. both cu-0 and cu+ species show c3h6 epoxidation activity. it is proposed that the isolated cu species and small cuox clusters with low valence state (cu-0 or cu+) modified by kac are the main active sites for c3h6 epoxidation on cu/sio2 catalyst with o-2 as the oxidant. (c) 2009 elsevier inc. all rights reserved.
WOS标题词	science & technology ; physical sciences ; technology
类目[WOS]	chemistry, physical ; engineering, chemical
研究领域[WOS]	chemistry ; engineering
关键词[WOS]	vapor-phase epoxidation ; gold nanoparticles ; ir spectroscopy ; higher olefins ; nitrous-oxide ; propene oxide ; cu+ ions ; oxygen ; hydrogen ; copper
收录类别	SCI
语种	英语
WOS记录号	WOS:000272349000019
公开日期	2015-11-17
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/141309]
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	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	Su, Weiguang,Wang, Shouguo,Ying, Pinliang,et al. A molecular insight into propylene epoxidation on Cu/SiO2 catalysts using O-2 as oxidant[J]. journal of catalysis,2009,268(1):165-174.
APA	Su, Weiguang,Wang, Shouguo,Ying, Pinliang,Feng, Zhaochi,&Li, Can.(2009).A molecular insight into propylene epoxidation on Cu/SiO2 catalysts using O-2 as oxidant.journal of catalysis,268(1),165-174.
MLA	Su, Weiguang,et al."A molecular insight into propylene epoxidation on Cu/SiO2 catalysts using O-2 as oxidant".journal of catalysis 268.1(2009):165-174.