HYDROGEN ISOTOPE EXCHANGE IN A COVERAGE OBTAINED AFTER ETHYLENE ADSORPTION ON AN IR(110) SURFACE

被引：2

作者：

CHAKAROV, DV

MARINOVA, T

机构：

[1] Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Sofia

来源：

SURFACE SCIENCE | 1990年 / 227卷 / 03期

关键词：

D O I：

10.1016/S0039-6028(05)80019-6

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 hydrogen isotope exchange in a coverage obtained after ethylene adsorption on Ir(110) has been investigated by HREELS, TDS and SIMS within a temperature range of 170-500 K at hydrogen (deuterium) pressures up to 1 × 10-6 Pa. Hydrogenation products are found neither after ethylene adsorption on a hydrogen-precovered surface nor on a hydrocarbon coverage exposed to hydrogen (up to 2000 L). The exchange of hydrogen in the ethylidyne species formed on the surface after ethylene adsorption is a slow process, contrary to the exchange in the products (CxH fragments) of their decomposition. The exchange in CCH and CH species is rapid and takes place with the participation of atomically adsorbed hydrogen at temperatures up to about 400 K. The exchange processes are compared with those earlier observed on the Ir(111) surface. © 1990 Elsevier Science Publishers B.V. (North-Holland).

引用

页码：310 / 316

页数：7

共 22 条

[1] ADSORPTION AND THERMAL-DECOMPOSITION OF ETHYLENE ON CLEAN AND CARBON MONOXIDE-COVERED IR(110) SURFACES [J].