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题名: Adsorption and reaction of CO on the Sm/Rh(100) model surface
作者: Ma, YS;  Zhu, JF;  Zhou, WP;  Zhai, RS;  Bao, XH;  Zhang, XY;  Zhuang, SX
关键词: Rh(100) surface ;  Sm film ;  Sm/Rh surface alloy ;  CO adsorption
刊名: CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE
发表日期: 2002
卷: 23, 期:1, 页:83-86
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Multidisciplinary
研究领域[WOS]: Chemistry
英文摘要: The preparation of Sm overlayer and Sm/Rh surface alloy on Rh(100) surface, adsorption and reaction of CO on these two model surfaces were investigated with AES, LEED, XPS and TDS. The growth of Sm overlayer appears following the SK mode at room temperature. Annealing of Sm overlayer at 900 K leads to formation of the ordered Sm/Rh surface alloy which exhibits the c(5 root2 X root2)R45degrees-Sm and c(2 X 2)-Sm LEED patterns. The morphology of Sm/Rh 0 00) surface changes completely during CO adsorption due to the formation of SmOx and surface carbon. With the increasing of the Sm coverage, a drastic decrease in the peak area and a peak shift to higher temperature were observed for the low temperature desorption of CO(alpha-CO) from the Sm/Rh(100) surface, indicating that both the site blocking of preadsorbed Sm and the electron donation from Sm can simultaneously affect the CO adsorption. In the case of the Sm/Rh surface alloy, a new desorption peak of CO grows at similar to590 K, which is assigned to CO on the Sm-affected Rh sites.
关键词[WOS]: COADSORPTION ;  OVERLAYERS ;  SAMARIUM ;  RU(001) ;  FILMS
语种: 英语
WOS记录号: WOS:000173834700022
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/139070
Appears in Collections:中国科学院大连化学物理研究所_期刊论文

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作者单位: 1.Univ Sci & Technol China, Dept Chem Phys, Hefei 230026, Peoples R China
2.Univ Sci & Technol China, Natl Synchrotron Radiat Lab, Hefei 230029, Peoples R China
3.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Ma, YS,Zhu, JF,Zhou, WP,et al. Adsorption and reaction of CO on the Sm/Rh(100) model surface[J]. CHEMICAL JOURNAL OF CHINESE UNIVERSITIES-CHINESE,2002,23(1):83-86.
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