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学科主题: 物理化学
题名: Carbon Monoxide and Hydrogen adsorption on Rh(553) and Rh(322)
作者: Ma XF(马秀芳) ;  Deng HQ(邓辉球) ;  J.N.Andersen ;  Li WX(李微雪)
会议名称: 14th International Congress on Catalysis
会议日期: 2008-07-13
出版日期: 2008-07-13
会议地点: 韩国
其他题名: 一氧化碳与氢在Rh(553)与Rh(322)面的吸附
通讯作者: Wei-Xue Li
ISSN: 89-9552665-5-1 93510
部门归属: 五室
主办者: the International Association of Catalysis Societies and the Korean Institute of Chemical Engineers
摘要: Due to the rich chemistry at the step edge, the vicinal surfaces are widely used as model system of realistic catalysts for the mechanism study. To provide insight into the influence of different type of steps on the reactivity, density functional theory (DFT) calculations and X-ray Photoelectron Spectroscopy (XPS) measurements have been used to study the CO and H adsorption on Rh(553) and Rh(322) surfaces, which have same width of (111) terrace but different type of steps (111) and (100), respectively. We found that CO molecules prefer to adsorb atop sites at the step edge. With increase of the coverage, CO will populate the terrace sites. At low coverage of CO, adding H to the system, CO molecules are moved entirely to the terraces on Rh(553), while stays at the step edge but changes to bridge sites on Rh(322). DFT calculations reveal that the different coadsorption pattern formed is due to the formation of favorable 1D metal hydride along the step edge on Rh(553). The different adsorption parrterns may affect the reactivity between CO and H, the main components of the syn-gas, whose conversion to the liquid fuel is crucial to the energy consumption of society.
语种: 中文
内容类型: 会议论文
URI标识: http://cas-ir.dicp.ac.cn/handle/321008/112882
Appears in Collections:中国科学院大连化学物理研究所_会议论文

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Recommended Citation:
Ma XF,Deng HQ,J.N.Andersen,et al. Carbon Monoxide and Hydrogen adsorption on Rh(553) and Rh(322)[C]. 见:14th International Congress on Catalysis. 韩国. 2008-07-13.
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