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题名: INVESTIGATION ON SURFACE METALLIC ACTIVE STRUCTURE OF SUPPORTED RUTHENIUM CATALYST
作者: Ding Yunjie1;  Liang Dongbai;  Lin Liwu;  Li Can1;  Xin Qin1
关键词: Ru catalyst ;  F-T synthesis ;  Active structure
刊名: ACTA PHYSICO-CHIMICA SINICA
发表日期: 1993
DOI: 10.3866/PKU.WHXB19930608
卷: 9, 期:6, 页:760-764
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ;  Physical Sciences
类目[WOS]: Chemistry, Physical
研究领域[WOS]: Chemistry
英文摘要: The metallic surface structure of supported Ru catalysts, activated at different pretreatment conditions, was investigated by following the development of IR bands due to adsorbed CO, as well as by following the methane formation in temperature-programmed surface reaction (TPSR-MS) of adsorbed CO in a H-2 flow. It revealed that there existed three kinds of active sites, designated as S-1, S-2 and S-3 sites,respectively. The S-1 sites, characterized by low frequency (LF) bands of 1980 similar to 2060cm(-1) for linearly adsorbed CO, were attributed to metallic Ru particles with almost no interaction with the support. The TPSR-MS results showed that, when reaction with H-2, the adsorbed CO on these sites changed into CH4 at a lower temperature of ca. 450K, varying with activated conditions. On the other hand, the S-2 sites were visualized to be interfacial Ru particles in direct contact with supporting materials, and exhibited stronger interaction with support. As a result of this MSI effect, the S-2 sites would result in the formation of electron-deficient Ru delta+ sites, and maintain high dispersive states of metal catalysts, and also adsorb CO with configuation of Ru delta+-CO at 2075 +/- 5cm(-1) medium frequency (MF2). Upon hydrogenation, the adsorbed CO formed methane at a much higher temperature of ca. 650K. Obviously, the S-1 and S-2 sites are static sites of the conventional nature.
语种: 英语
WOS记录号: WOS:000207577800008
Citation statistics: 
内容类型: 期刊论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/142664
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.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China

Recommended Citation:
Ding Yunjie,Liang Dongbai,Lin Liwu,et al. INVESTIGATION ON SURFACE METALLIC ACTIVE STRUCTURE OF SUPPORTED RUTHENIUM CATALYST[J]. ACTA PHYSICO-CHIMICA SINICA,1993,9(6):760-764.
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