Spectroscopic study of CO adsorption on palladium-ceria catalysts

被引：108

作者：

Bensalem, A ^{[1
]}

Muller, JC ^{[1
]}

Tessier, D ^{[1
]}

BozonVerduraz, F ^{[1
]}

机构：

[1] UNIV PARIS 07,LAB CHIM MATERIAUX DIVISES & CATALYSE,F-75251 PARIS 05,FRANCE

来源：

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS | 1996年 / 92卷 / 17期

关键词：

D O I：

10.1039/ft9969203233

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：

CO adsorption on palladium-ceria catalysts prepared from Pd acetylacetonate has been investigated by IR and UV-VIS spectroscopies and by volumetric measurements. After calcination and evacuation at 673 K, the samples contain small PdO particles which are immediately reduced upon adsorption of CO at room temperature. For samples prereduced by H-2, electron-donor centres (Ce3+ ions, oxygen vacancies) are created during the pretreatment. These centres are responsible for increased CO adsorption by ceria in the presence of palladium, which leads to apparent CO : Pd values greater than unity and their interaction with palladium induces a carrier-to-metal electron transfer. Plasmon absorption in reducible carriers hinders the detection of species adsorbed on the supported metal.

引用

页码：3233 / 3237

页数：5

共 35 条

[1]

[Anonymous], 1992, GEN PHYS PROPERTIES

[2] CARBON-MONOXIDE ADSORPTION ON PD/CEO2 CATALYSTS - AN FTIR STUDY OF CARBONYL CLUSTERS [J].

BADRI, A ;

BINET, C ;

LAVALLEY, JCJ .

JOURNAL DE CHIMIE PHYSIQUE ET DE PHYSICO-CHIMIE BIOLOGIQUE, 1995, 92 (7-8) :1333-1343

[3]

BADRI A, 1991, EUR J SOL STATE INOR, V28, P445

[4] PALLADIUM-CERIA CATALYSTS - REVERSIBILITY OF HYDROGEN CHEMISORPTION AND REDOX PHENOMENA [J].

BENSALEM, A ;

BOZONVERDURAZ, F ;

PERRICHON, V .

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, 1995, 91 (14) :2185-2189

[5]

Bensalem A., 1993, J SOC ALG CHIM, V2, P329

[6] 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

[7] A SPECTROSCOPIC CHARACTERIZATION OF THE REDUCTION OF CERIA FROM ELECTRONIC-TRANSITIONS OF INTRINSIC POINT-DEFECTS [J].

BINET, C ;

BADRI, A ;

LAVALLEY, JC .

JOURNAL OF PHYSICAL CHEMISTRY, 1994, 98 (25) :6392-6398

[8] METAL SUPPORT INTERACTION IN PD/CEO2 CATALYSTS - FOURIER-TRANSFORM INFRARED STUDIES OF THE EFFECTS OF THE REDUCTION TEMPERATURE AND METAL LOADING .1. CATALYSTS PREPARED BY THE MICROEMULSION TECHNIQUE [J].

BINET, C ;

JADI, A ;

LAVALLEY, JC ;

BOUTONNETKIZLING, M .

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, 1992, 88 (14) :2079-2084

[9] INFRARED-SPECTRUM OF MICROCRYSTALLINE ZINC-OXIDE - ELECTRONIC AND VIBRATIONAL CONTRIBUTIONS UNDER DIFFERENT TEMPERATURE AND ENVIRONMENTAL-CONDITIONS [J].

BOCCUZZI, F ;

MORTERRA, C ;

SCALA, R ;

ZECCHINA, A .

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS II, 1981, 77 :2059-2066

[10] PREPARATION OF PD/SIO2 CATALYSTS FOR METHANOL SYNTHESIS .3. EXPOSED METAL FRACTION AND HYDROGEN SOLUBILITY [J].

BONIVARDI, AL ;

BALTANAS, MA .

JOURNAL OF CATALYSIS, 1992, 138 (02) :500-517

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