COADSORPTION OF CO AND K ON Ni(100). I. TDS STUDIES.

被引：44

作者：

Luftman, H.S. ^{[1
]}

Sun, Y.-M. ^{[1
]}

White, J.M. ^{[1
]}

机构：

[1] Univ of Texas at Austin, Dep of, Chemistry, Austin, TX, USA, Univ of Texas at Austin, Dep of Chemistry, Austin, TX, USA

来源：

Applications of surface science | 1983年 / 19卷 / 1-4期

关键词：

CARBON MONOXIDE - Adsorption - NICKEL AND ALLOYS - Additives - SURFACES - Spectroscopic Analysis;

D O I：

10.1016/0378-5963(84)90053-9

中图分类号：

学科分类号：

摘要：

Thermal desorption spectroscopy (TDS) has been used to study the coadsorption system, carbon monoxide and potassium, dosed at 120 K on a Ni(100) surface. Two CO desorption states are induced by predosed K. The lower-temperature state, attributed to molecular desorption, shifts to higher temperatures with increasing K precoverage and to lower temperatures with increasing CO exposure. The intensity of the high-temperature state, attributed to associative desorption of absorbed C and O atoms, increases linearly with K coverage. Potassium desorption occurs simultaneously. Models involving long-range (indirect) K effects on adsorbed CO are supported.

引用

页码：59 / 72