INFRARED STUDY OF CO ADSORPTION ON PT-RH/SIO2 CATALYSTS

被引：20

作者：

ANDERSON, JA ^{[1
]}

SOLYMOSI, F ^{[1
]}

机构：

[1] ATTILA JOZSEF UNIV,REACT KINET RES GRP,H-6701 SZEGED,HUNGARY

来源：

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS | 1991年 / 87卷 / 20期

关键词：

D O I：

10.1039/ft9918703435

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：

Infrared spectra are reported of CO adsorbed on Pt/SiO2, Rh/SiO2 and Pt-Rh/SiO2 in the temperature ranges 93-300 and 303-573 K. CO adsorption as a function of time was studied for high-temperature reduced samples (973 K). The influence of platinum was to decrease the rate at which the rhodium gem-dicarbonyl species was formed and to increase the rate at which metal clusters were reformed. Coupling effects between Pt-CO and Rh-CO at low temperatures indicate that crystallites exist containing well mixed surface layers of platinum and rhodium atoms. The effect of platinum on rhodium particle morphology is discussed.

引用

页码：3435 / 3442

页数：8

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