Weakly chemisorbed CO layer on Rh(100) as detected by reverse flash and field ion appearance energy measurements

被引：10

作者：

Medvedev, VK ^{[1
]}

Kulik, VS ^{[1
]}

Chernyi, VI ^{[1
]}

Suchorski, Y ^{[1
]}

机构：

[1] NATL ACAD SCI UKRAINE,INST PHYS,KIEV,UKRAINE

来源：

VACUUM | 1997年 / 48卷 / 3-4期

关键词：

D O I：

10.1016/S0042-207X(96)00286-2

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Using the reverse flash (RF) method the sticking coefficient and binding energy of CO molecules on Rh(?OO) are obtained for CO surface densities up to 1.2 x 10(15) cm(-2). The presence of weakly bound CO molecules with a binding energy of 0.34 eV is detected at n > 1.0 x 10(15) cm(-2). Mass-to-charge-resolved retarding potential analysis of CO+ emitted from Rh(100) is performed and absolute values of CO+ field ion appearance energy obtained. By applying a thermionic cycle field-dependent values of the binding energy of CO/Rh(100) at high coverages are obtained. A comparison of field-free (RF) results and field ion appearance energy spectroscopy (FIAES) data reveals the weakly bound (field-stabilized) CO layer as the origin of CO+ field ions emitted from Rh(100) for field ion imaging. (C) 1997 Elsevier Science Ltd.

引用

页码：341 / 345

页数：5

共 30 条

[1] LEED AND THERMAL DESORPTION STUDIES OF SMALL MOLECULES (H2,O2,CO,CO2,NO,C2H4,C2H2 AND C) CHEMISORBED ON RHODIUM (111) AND (100) SURFACES [J].