Structural changes of Au-Cu bimetallic catalysts in CO oxidation: In situ XRD, EPR, XANES, and FT-IR characterizations

	Structural changes of Au-Cu bimetallic catalysts in CO oxidation: In situ XRD, EPR, XANES, and FT-IR characterizations
	Liu, Xiaoyan 1,3; Wang, Aiqin 3; Li, Lin 3; Zhang, Tao 3; Mou, Chung-Yuan 1; Lee, Jyh-Fu 2
刊名	journal of catalysis
	2011-03-07
卷号	278 期号:2 页码:288-296
关键词	Gold Copper Bimetallic CO oxidation XANES EPR FT-IR In situ XRD
ISSN号	0021-9517
通讯作者	张涛 ; 牟中原
产权排序	1,1
中文摘要	structural changes of au-cu bimetallic catalysts in co oxidation: in situ xrd, epr, xanes, and ft-ir characterizations
英文摘要	au-cu bimetallic nanoparticles supported on sba-15 have been reported to be much more active in co oxidation than the corresponding monometallic counterparts in our previous work. in this work, in situ techniques including xrd, epr, xanes, and ft-ir were employed to reveal the structural changes of the au-cu bimetallic particles during different pretreatment and reaction conditions, and to clarify the essence of the synergistic effect between gold and copper. the results showed that gold remained as au(0) in any treatment conditions, while copper was very sensitive to the treatment temperature and atmosphere. the freshly reduced catalyst was a mixture of au(3)cu(1) intermetallic phase and cu(2)o amorphous phase. in co oxidation, the au(3)cu(1) intermetallic phase was segregated into a gold core decorated with tiny cuo(x) patches, and co adsorbed on au(0) reacted with active oxygen provided by the neighboring cuo(x) thus enhancing greatly the activity for co oxidation. (c) 2010 elsevier inc. all rights reserved.
学科主题	物理化学
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]	methanol fuel-cells ; gold nanoparticles ; room-temperature ; selective oxidation ; alloy nanoparticles ; propene epoxidation ; mesoporous support ; au/sio2 catalyst ; adsorbed co ; active gold
收录类别	SCI
语种	英语
WOS记录号	WOS:000288294600013
公开日期	2012-07-09
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/115806]
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.Natl Taiwan Univ, Dept Chem, Taipei 10617, Taiwan 2.Natl Synchrotron Radiat Res Ctr, Hsinchu 30076, Taiwan 3.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	Liu, Xiaoyan,Wang, Aiqin,Li, Lin,et al. Structural changes of Au-Cu bimetallic catalysts in CO oxidation: In situ XRD, EPR, XANES, and FT-IR characterizations[J]. journal of catalysis,2011,278(2):288-296.
APA	Liu, Xiaoyan,Wang, Aiqin,Li, Lin,Zhang, Tao,Mou, Chung-Yuan,&Lee, Jyh-Fu.(2011).Structural changes of Au-Cu bimetallic catalysts in CO oxidation: In situ XRD, EPR, XANES, and FT-IR characterizations.journal of catalysis,278(2),288-296.
MLA	Liu, Xiaoyan,et al."Structural changes of Au-Cu bimetallic catalysts in CO oxidation: In situ XRD, EPR, XANES, and FT-IR characterizations".journal of catalysis 278.2(2011):288-296.