Interaction of CO and NO with WC(0001)

被引：23

作者：

Brillo, J ^{[1
]}

Sur, R ^{[1
]}

Kuhlenbeck, H ^{[1
]}

Freund, HJ ^{[1
]}

机构：

[1] Max Planck Gesell, Fritz Haber Inst, Phys Chem Abt, D-14195 Berlin, Germany

来源：

SURFACE SCIENCE | 1998年 / 397卷 / 1-3期

关键词：

adsorption; angle resolved photoemission; CO; NO; thermal desorption spectroscopy; tungsten carbide;

D O I：

10.1016/S0039-6028(97)00725-5

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 results of angular resolved photoemission and thermal desorption spectroscopy investigations of the adsorption of CO and NO on a WC(0001) single crystal surface are reported. Both molecules are stable only at low temperature. Similar to the case of adsorption on many transition metals, CO is co-ordinated to the surface via its carbon end, standing upright on the surface. Upon warming up, complete dissociation takes place at temperatures of ca 270 K for CO and 150 K for NO. A part of the CO molecules also desorbs between 200 and 250 K, whereas no molecular desorption is found for NO. Recombinative/reactive desorption is observed in the temperature range between 700 and 1200 K. (C) 1998 Elsevier Science B.V.

引用

页码：137 / 144

页数：8