A TENSOR LEED ANALYSIS OF THE RH(110)-P2MG(2X1)-2CO STRUCTURE

被引:19
作者
BATTEAS, JD
BARBIERI, A
STARKEY, EK
VANHOVE, MA
SOMORJAI, GA
机构
[1] LAWRENCE BERKELEY LAB,CTR ADV MAT,DIV MAT SCI,BERKELEY,CA 94720
[2] UNIV CALIF BERKELEY,DEPT CHEM,BERKELEY,CA 94720
关键词
D O I
10.1016/0039-6028(94)90054-X
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
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.
引用
收藏
页码:341 / 348
页数:8
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