THE NATURE OF CHEMISORBED HYDROXYL RADICALS

被引：41
作者：
PATRITO, EM [1 ]
OLIVERA, PP [1 ]
SELLERS, H [1 ]
机构：
[1] S DAKOTA STATE UNIV,DEPT CHEM,BROOKINGS,SD 57007
来源：
SURFACE SCIENCE | 1994年 / 306卷 / 03期
基金：
美国国家科学基金会;
关键词：
D O I：
10.1016/0039-6028(94)90085-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 energetics of hydroxyl adsorption on Pt, Pd, Rh and Ni have been investigated using the bond order conservation-Morse potential approach (BOC-MP). The heat of adsorption of hydroxyl (Q(OH)) was calculated both under high oxygen coverage and oxygen depleted conditions. Adsorbate-adsorbate interactions must be taken into account in order to explain the observed variation of activation energies for OH desorption reported in the literature for each metal and under different experimental conditions. High oxygen coverages lower the heat of hydroxyl adsorption, while at low oxygen coverages island formation between hydroxyls and hydrogen bonding explain the increase in the heat of adsorption of hydroxyl radicals. The calculated heats of adsorption for the different conditions are in quantitative agreement with experimental results.
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页码：447 / 458
页数：12
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