Interaction of molecular hydrogen with three-way catalyst model of Pt/Ce0.6Zr0.4O2/Al2O3 type

被引：33

作者：

Fornasiero, P

Kaspar, J

Montini, T

Graziani, M

Dal Santo, V

Psaro, R

Recchia, S

机构：

[1] Univ Trieste, Dipartimento Sci Chim, I-34127 Trieste, Italy

[2] CNR, Ist Sci & Tecnol Mol, I-20133 Milan, Italy

[3] Univ Insubria, Dipartimento Sci CC FF MM, I-22100 Como, Italy

来源：

JOURNAL OF MOLECULAR CATALYSIS A-CHEMICAL | 2003年 / 204卷

关键词：

ceria-zirconia mixed oxides; hydrogen spillover; alumina support; three-way catalyst; platinum catalyst;

D O I：

10.1016/S1381-1169(03)00352-2

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 interaction of H with a composite Pt/Ce(0.6)Zr(0.4)O(2)/Al(2)O(3) system and its redox properties are investigated by means of H(2) and O(2) chemisorption, temperature programmed reduction (TPR) and desorption techniques. It is shown that the high H(2) spillover capabilities of Pt/CeO(2)-ZrO(2) are maintained even after supporting the system on Al(2)O(3). The re-oxidation experiments performed on the reduced moieties show that the stability of Ce(III) species is increased by Al(2)O(3), while the presence of Pt favours the re-oxidation. (C) 2003 Elsevier Science B.V All rights reserved.

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收藏

页码：683 / 691

页数：9

相关论文

共 21 条

[1] HREM STUDY OF THE BEHAVIOR OF A RH/CEO2 CATALYST UNDER HIGH-TEMPERATURE REDUCING AND OXIDIZING CONDITIONS [J].

BERNAL, S ;

BOTANA, FJ ;

CALVINO, JJ ;

CIFREDO, GA ;

PEREZOMIL, JA .

CATALYSIS TODAY, 1995, 23 (03) :219-250

[2] 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

[3] INFLUENCE OF THE REDUCTION EVACUATION CONDITIONS ON THE RATE OF HYDROGEN SPILLOVER ON RH/CEO2 CATALYSTS [J].

BERNAL, S ;

CALVINO, JJ ;

CIFREDO, GA ;

LAACHIR, A ;

PERRICHON, V ;

HERRMANN, JM .

LANGMUIR, 1994, 10 (03) :717-722

[4] Stabilisation of nanostructured Ce0.2Zr0.8O2 solid solution by impregnation on Al2O3:: a suitable method for the production of thermally stable oxygen storage/release promoters for three-way catalysts [J].

Di Monte, R ;

Fornasiero, P ;

Kaspar, J ;

Graziani, M ;

Gatica, JM ;

Bernal, S ;

Gómez-Herrero, A .

CHEMICAL COMMUNICATIONS, 2000, (21) :2167-2168

[5]

Di Monte R, 2001, STUD SURF SCI CATAL, V140, P229

[6] Structural characteristics and redox behavior of CeO2-ZrO2/Al2O3 supports [J].

Fernández-García, M ;

Martínez-Arias, A ;

Iglesias-Juez, A ;

Belver, C ;

Hungría, AB ;

Conesa, JC ;

Soria, J .

JOURNAL OF CATALYSIS, 2000, 194 (02) :385-392

[7] RH-LOADED CEO2-ZRO2 SOLID-SOLUTIONS AS HIGHLY EFFICIENT OXYGEN EXCHANGERS - DEPENDENCE OF THE REDUCTION BEHAVIOR AND THE OXYGEN STORAGE CAPACITY ON THE STRUCTURAL-PROPERTIES [J].

FORNASIERO, P ;

DIMONTE, R ;

RAO, GR ;

KASPAR, J ;

MERIANI, S ;

TROVARELLI, A ;

GRAZIANI, M .

JOURNAL OF CATALYSIS, 1995, 151 (01) :168-177

[8] Characterization of the metal phase in NM/Ce0.68Zr0.32O2 (NM: Pt and Pd) catalysts by hydrogen chemisorption and HRTEM microscopy:: A comparative study [J].

Gatica, JM ;

Baker, RT ;

Fornasiero, P ;

Bernal, S ;

Kaspar, J .

JOURNAL OF PHYSICAL CHEMISTRY B, 2001, 105 (06) :1191-1199

[9] Significant room temperature oxygen storage over 0.58% Pt/Ce0.68Zr0.32O2 when H2 is used as a reducing agent [J].

Hickey, N ;

Fornasiero, P ;

Kaspar, J ;

Graziani, M ;

Blanco, G ;

Bernal, S .

CHEMICAL COMMUNICATIONS, 2000, (05) :357-358

[10] Effects of the nature of the reducing agent on the transient redox behavior of NM/Ce0.68Zr0.32O2 (NM = Pt, Pd, and Rh) [J].

Hickey, N ;

Fornasiero, P ;

Kaspar, J ;

Gatica, JM ;

Bernal, S .

JOURNAL OF CATALYSIS, 2001, 200 (01) :181-193