ADSORPTION OF O-2 ON PD(110)

被引：117

作者：

GOSCHNICK, J

WOLF, M

GRUNZE, M

UNERTL, WN

BLOCK, JH

LOBODACACKOVIC, J

机构：

[1] Fritz-Haber-Institut der Max-Planck-Gesellschaft, D-1000 Berlin33

来源：

SURFACE SCIENCE | 1986年 / 178卷 / 1-3期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1016/0039-6028(86)90358-4

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：

We studied the adsorption of oxygen on Pd(110) in the temperature range from 100 to 600 K. The experimental apparatus used a video LEED system to monitor changes in surface crystallography and two mass spectrometers to study adsorption, desorption and reaction with CO. The sticking coefficient for dissociative oxygen adsorption is 0.86 ± 0.03 at T > 160 K. For T < 160 K molecular oxygen adsorption was observed. Atomic oxygen coverage measurements were performed by reaction of the oxygen with CO to form CO2. Up to a coverage of θ ≈ 0.23, we observed a LEED pattern previously identified as a (1 × 3) overlayer. However, our data rule out a simple adsorbate overlayer. The changes of the reciprocal lattice positions of the 1 3" spots as a function of oxygen coverage suggest an incommensurate structure with respect to the Pd(110) bulk periodicity. At θ > 0.23 a commensurate c(2 × 4) phase is formed and saturates at θ ≈ 0.48. © 1986."

引用

页码：831 / 841

页数：11

共 11 条

[1] ADSORPTION OF CO ON PD(100) [J].