A TENSOR LEED ANALYSIS OF THE RH(110)-P2MG(2X1)-2CO STRUCTURE
A TENSOR LEED ANALYSIS OF THE RH(110)-P2MG(2X1)-2CO STRUCTURE
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DOI：
10.1016/0039-6028(94)90054-x
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发表时间：
1994-07-01
期刊：
影响因子：
1.9
通讯作者：
SOMORJAI, GA
中科院分区：
文献类型：
--
作者：
BATTEAS, JD;BARBIERI, A;SOMORJAI, GA
通过LEED强度分析确定了清洁和CO覆盖的Rh（110）表面的结构几何。相对于主体层间间距，清洁表面表现出0.09 +/-0.02埃的顶层收缩和0.03 +/-0.03埃的第二层膨胀。在吸附1 ML的CO时，分子沿[110 BAR]方向以Z字形方式沿着排列，以产生在LEED图案中观察到的滑移面对称性。清洁的表面弛豫被去除，并且每个CO键靠近短桥位点，其中CO分子轴从表面法线取向约24度。这种键合几何形状导致1.97 +/-0.09埃的Rh-C键长和1.13 +/-0.09埃的C-O键长。
The structural geometries of both the clean and CO covered Rh(110) surfaces have been determined by a LEED intensity analysis. The clean surface exhibits a top layer contraction of 0.09 +/- 0.02 angstrom and a second layer expansion of 0.03 +/- 0.03 angstrom relative to the bulk interlayer spacing. Upon the adsorption of 1 ML of CO the molecules are arranged in a zig-zag fashion along the [110BAR] direction to produce the observed glide plane symmetry in the LEED pattern. The clean surface relaxations are removed and each CO bonds near a short bridge site with the CO molecular axis oriented approximately 24-degrees from the surface normal. This bonding geometry results in a Rh-C bond length of 1.97 +/- 0.09 angstrom and a C-O bond length of 1.13 +/- 0.09 angstrom.