Chlorine-induced alterations in oxidation state and CO chemisorptive properties of CeO2-supported Rh catalysts

被引：42

作者：

Kondarides, DI ^{[1
]}

Zhang, ZL ^{[1
]}

Verykios, XE ^{[1
]}

机构：

[1] Univ Patras, Dept Chem Engn, GR-26500 Patras, Greece

来源：

JOURNAL OF CATALYSIS | 1998年 / 176卷 / 02期

关键词：

D O I：

10.1006/jcat.1998.2064

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 influence of residual chlorine species, originating from catalyst preparation procedures, on the carbon monoxide adsorption/desorption characteristics of Rh/CeO2 catalysts and on the oxidation state of the supported rhodium particles is studied by FTIR and X-ray photoelectron spectroscopy. Depending on the preparation procedure and the experimental conditions, three rhodium species may coexist on the catalyst surface, i.e. Rh-0, Rh+, and Rh3+. The presence of Cl species is found to stabilize an amount of rhodium in the Rh3+ oxidation state and to alter significantly the CO adsorption and desorption behavior of the catalysts. The kinetic rate of approach to chemisorptive equilibrium as well as the relative population and the thermal stability of the adsorbed CO species at equilibrium are significantly affected by the presence of Cl on the catalyst surface. (C) 1998 Academic Press.

引用

页码：536 / 544

页数：9

共 38 条

[1] Surface-chlorinated ceria and chlorine-containing reduced Pd/CeO2 catalysts. A FTIR study [J].

Badri, A ;

Binet, C ;

Lavalley, JC .

JOURNAL OF PHYSICAL CHEMISTRY, 1996, 100 (20) :8363-8368

[2] AN EXAMINATION OF RH/MGO CATALYST USING X-RAY PHOTOELECTRON-SPECTROSCOPY [J].

BALTANAS, MA ;

ONUFERKO, JH ;

MCMILLAN, ST ;

KATZER, JR .

JOURNAL OF PHYSICAL CHEMISTRY, 1987, 91 (14) :3772-3774

[3] SPECTROSCOPIC EVIDENCE FOR THE INVOLVEMENT OF OH GROUPS IN THE FORMATION OF RHI(CO)2 ON METAL-OXIDE SUPPORTS [J].

BASU, P ;

PANAYOTOV, D ;

YATES, JT .

JOURNAL OF PHYSICAL CHEMISTRY, 1987, 91 (12) :3133-3136

[4] INTERACTION OF [RH(CO)2CL]2 WITH O2 OXIDIZED AL(100) - EFFECT OF AL2O3 PREPARATION ON [RH(CO)2CL]2 DECOMPOSITION [J].

BELTON, DN ;

SCHMIEG, SJ .

SURFACE SCIENCE, 1988, 199 (03) :518-536

[5] CO-INDUCED DISINTEGRATION OF RHODIUM AGGREGATES SUPPORTED IN ZEOLITES - INSITU SYNTHESIS OF RHODIUM CARBONYL CLUSTERS [J].

BERGERET, G ;

GALLEZOT, P ;

GELIN, P ;

BENTAARIT, Y ;

LEFEBVRE, F ;

NACCACHE, C ;

SHANNON, RD .

JOURNAL OF CATALYSIS, 1987, 104 (02) :279-287

[6] MICROSTRUCTURAL AND CHEMICAL-PROPERTIES OF CERIA-SUPPORTED RHODIUM CATALYSTS REDUCED AT 773-K [J].

BERNAL, S ;

BOTANA, FJ ;

CALVINO, JJ ;

CAUQUI, MA ;

CIFREDO, GA ;

JOBACHO, A ;

PINTADO, JM ;

RODRIGUEZIZQUIERDO, JM .

JOURNAL OF PHYSICAL CHEMISTRY, 1993, 97 (16) :4118-4123

[7] HYDROGEN CHEMISORPTION ON CERIA - INFLUENCE OF THE OXIDE SURFACE-AREA AND DEGREE OF REDUCTION [J].

BERNAL, S ;

CALVINO, JJ ;

CIFREDO, GA ;

GATICA, JM ;

OMIL, JAP ;

PINTADO, JM .

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, 1993, 89 (18) :3499-3505

[8] REVERSIBILITY OF HYDROGEN CHEMISORPTION ON A CERIA-SUPPORTED RHODIUM CATALYST [J].

BERNAL, S ;

CALVINO, JJ ;

CIFREDO, GA ;

RODRIGUEZIZQUIERDO, JM ;

PERRICHON, V ;

LAACHIR, A .

JOURNAL OF CATALYSIS, 1992, 137 (01) :1-11

[9] CHARACTERISATION OF RARE EARTH OXIDE SUPPORTED METAL CATALYSTS. STUDY OF SOME CERIA SUPPORTED RHODIUM PHASES [J].

Bernal, S. ;

Botana, F. J. ;

Garcia, R. ;

Kang, Z. ;

Lopez, M. L. ;

Pan, M. ;

Ramirez, F. ;

Rodriguez-Izquierdo, J. M. .

CATALYSIS TODAY, 1988, 2 (05) :653-662

[10]

BRIGGS D, 1990, PRACTICAL SURFACE AN, V1

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