The effect of adsorbed oxygen on the stability of NCO on Rh(111) studied by reflection absorption infrared spectroscopy

被引：42
|
作者：
Kiss, J [1 ]
Solymosi, F
机构：
[1] Attila Jozsef Univ, Inst Solid State & Radiochem, H-6701 Szeged, Hungary
[2] Hungarian Acad Sci, React Kinet Res Grp, Ctr Catalysis Surface & Mat Sci, Univ Szeged, H-6701 Szeged, Hungary
来源：
JOURNAL OF CATALYSIS | 1998年 / 179卷 / 01期
基金：
匈牙利科学研究基金会;
关键词：
NO plus CO reaction; adsorption of HNCO; NCO surface complex; decomposition of NCO; effects of coadsorbed oxygen; stabilizing effect of oxygen adatoms; reflection absorption infrared spectroscopy;
D O I：
10.1006/jcat.1998.2208
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 interaction of HNCO with Rh(111) has been studied with reflection absorption infrared spectroscopy. HNCO adsorbs dissociatively on Rh(111) at 150 K to yield adsorbed H and NCO species. On clean Rh(111) the NCO species was found to decompose readily to adsorbed CO and N on warming to room temperature. Preadsorbed oxygen atoms result in an increase in the relative amount of NCO, shifts the dominant vibrational band of NCO from 2160 to 2182 cm(-1), and significantly stabilizes the NCO species on Rh(111). The possible relevance of the stabilization of NCO in the NO + CO reaction is discussed. (C) 1998 Academic Press.
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页码：277 / 282
页数：6
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