INFRARED STUDY OF CO ADSORPTION ON PT-RH/AL2O3 CATALYSTS

被引：36
|
作者：
ANDERSON, JA
ROCHESTER, CH
机构：
来源：
JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS | 1991年 / 87卷 / 09期
关键词：
D O I：
10.1039/ft9918701479
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：
FTIR spectra are reported of CO adsorbed at 303-573 K on Pt/Al2O3, Rh/Al2O3 and Pt-Rh/Al2O3. Catalysts containing Rh were precalcined at either 673 K or 873 K before reduction in hydrogen and exposure to CO. The intensities of infrared bands due to gem-dicarbonyl and linear carbonyl species were a function of both the precalcination temperature and the temperature of contact with CO. Bridged carbonyl was also formed on both Rh and Pt. The results are discussed in terms of effects involving interactions between metal and support, interactions between Pt and Rh, structure after high-temperature calcination and structural reorganisation during contact with CO at high temperature.
引用
收藏
页码：1479 / 1483
页数：5
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