Asymmetric structure analysis of active surface-sites by in situ polarized total-reflection fluorescence EXAFS
Asymmetric structure analysis of active surface-sites by in situ polarized total-reflection fluorescence EXAFS
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原位偏振全反射荧光 EXAFS 分析活性表面位点的不对称结构
DOI：
10.1007/bf00772603
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发表时间：
1993
影响因子：
2.8
通讯作者：
Y. Iwasawa
中科院分区：
文献类型：
--
作者：
K. Asakura;M. Shirai;Y. Iwasawa
本文建立了一个偏振依赖的全反射荧光产额EXAFS系统，用于分析单晶表面催化活性金属中心的非对称结构。该技术分别揭示了平行于和垂直于支撑表面的键合特征。以Cu ~（2+）/α-石英（0001）、Co ~（2+）/α-氧化铝（0001）和Pt ~（4+）/α-氧化铝（0001）体系为载体催化体系的模型表面进行了研究。观察到Cu在α-石英（0001）上的位置，Co_3O_4在α-Al_2O_3（0001）上的外延生长方式，以及Pt_4/ α-Al_2O_3（0001）中存在金属-载体相互作用的Pt筏结构。
An in situ polarization-dependent total reflection fluorescence yield EXAFS system has been developed to analyze the asymmetric structures of catalytically active metal sites on single crystal surfaces. This technique separately reveals the bonding feature parallel and perpendicular to the support surface. The systems of Cu ion on α-quartz(0001), Co oxide on α-alumina(0001), and Pt4 on α-alumina(0001) were investigated as model surfaces of supported catalytic systems. The location of Cu sites on α-quartz(0001), the epitaxial growth mode of Co3O4 on α-alumina(0001), and the Pt raft structure with metal-support interaction in Pt4 / α-alumina(0001) were observed.