INFRARED STUDY OF CARBON MONOXIDE OXYGEN AND CARBON DIOXIDE ADSORPTION ON CHROMIA-SILICA .I. CARBON MONOXIDE

被引:18
作者
BORELLO, E
ZECCHINA, A
MORTERRA, C
GHIOTTI, G
机构
[1] Istituto di Chimica-Fisica, Università di Torino, Torino
关键词
D O I
10.1021/j100725a019
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
An investigation has been made of adsorption of carbon monoxide on a chromia-silica surface by infrared spectroscopy. Particular attention was paid to the bands in the 2210-2130-cm-1 spectral region, which can be assigned to species adsorbed onto chromium ions. Two main types of sites are present which act as electron acceptors via either a σ bond or a σ-π bond. Other finer effects, such as those arising from the influence of residual free holes on the electron affinity of the localized sites and the change of chromium coordination number, are revealed by shifts of the frequencies. Thus CO appears to be a good molecule for examining the surface of our catalyst.
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页码:1286 / &
相关论文
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