Physical and chemical properties of high density atomic oxygen overlayers under ultrahigh vacuum conditions: (1x1)-O/Rh(111)

被引:18
作者
Gibson, KD
Viste, M
Sanchez, E
Sibener, SJ
机构
[1] Univ Chicago, James Franck Inst, Chicago, IL 60637 USA
[2] Univ Chicago, Dept Chem, Chicago, IL 60637 USA
关键词
D O I
10.1063/1.480890
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
In this paper, we elaborate on our previous communication of high coverages of oxygen on Rh(111) [J. Chem. Phys. 110, 2757 (1999)]. When dosing with O(2), half of a monolayer of O is adsorbed. Higher coverages can be achieved when exposing the surface to O atoms. As the quantity of adsorbed O increases from a half to a full monolayer, the overlayer structure undergoes several distinct phase changes. At a full monolayer, the (1 x 1)-O structure is stable at surface temperatures less than similar to 400 K. Continued dosing with O atoms results in the rapid migration of O into the bulk. We also report on the chemical reactivity of this densely oxygen-covered surface with CO, H(2), and propene. (C) 2000 American Institute of Physics. [S0021-9606(00)70404-1].
引用
收藏
页码:2470 / 2478
页数:9
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