AN UNUSUAL PROMOTION OF THE REDOX BEHAVIOR OF CEO2-ZRO2 SOLID-SOLUTIONS UPON SINTERING AT HIGH-TEMPERATURES

被引：171

作者：

BALDUCCI, G

FORNASIERO, P

DIMONTE, R

KASPAR, J

MERIANI, S

GRAZIANI, M

机构：

[1] UNIV TRIESTE,DIPARTIMENTO SCI CHIM,I-34127 TRIESTE,ITALY

[2] UNIV TRIESTE,DIPARTIMENTO INGN MAT & CHIM APPLICATA,I-34127 TRIESTE,ITALY

来源：

CATALYSIS LETTERS | 1995年 / 33卷 / 1-2期

关键词：

EXHAUST CATALYSTS; CEO2-ZRO2 SOLID SOLUTIONS; OXYGEN STORAGE; TEMPERATURE PROGRAMMED REDUCTION; REDOX PROPERTIES;

D O I：

10.1007/BF00817058

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 reduction behaviour of a high surface area CeO2-ZrO2 solid solution is compared with that of a high surface area CeO2. It is shown that, upon sintering induced by repetitive reduction/oxidation processes, the temperature of reduction of the solid solution decreases from 900 to 700 K. In contrast, the reduction at low temperatures of the CeO2 Sample is strongly retarded after such treatments. The role of ZrO2 in promoting the reduction at low temperatures is discussed.

引用

收藏

页码：193 / 200

页数：8

相关论文

共 21 条

[1] THE DETERMINATION OF PORE VOLUME AND AREA DISTRIBUTIONS IN POROUS SUBSTANCES .1. COMPUTATIONS FROM NITROGEN ISOTHERMS [J].

BARRETT, EP ;

JOYNER, LG ;

HALENDA, PP .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1951, 73 (01) :373-380

[2] 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

[3]

DIMONTE R, 1994, THESIS U TRIESTE ITA

[4] REDOX PROCESSES ON PURE CERIA AND ON RH/CEO2 CATALYST MONITORED BY X-RAY-ABSORPTION (FAST ACQUISITION MODE) [J].

ELFALLAH, J ;

BOUJANA, S ;

DEXPERT, H ;

KIENNEMANN, A ;

MAJERUS, J ;

TOURET, O ;

VILLAIN, F ;

LENORMAND, F .

JOURNAL OF PHYSICAL CHEMISTRY, 1994, 98 (21) :5522-5533

[5] INDUCED CHANGES IN CERIA BY THERMAL TREATMENTS UNDER VACUUM OR HYDROGEN [J].

FIERRO, JLG ;

SORIA, J ;

SANZ, J ;

ROJO, JM .

JOURNAL OF SOLID STATE CHEMISTRY, 1987, 66 (01) :154-162

[6] 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

[7]

Harrison B., 1988, PLATIN MET REV, V32, P73

[8] RAMAN-SCATTERING STUDY OF CRYSTALLIZATION AND PHASE-TRANSFORMATIONS OF ZRO2 [J].

KERAMIDAS, VG ;

WHITE, WB .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1974, 57 (01) :22-24

[9] REDUCTION OF CEO2 BY HYDROGEN - MAGNETIC-SUSCEPTIBILITY AND FOURIER-TRANSFORM INFRARED, ULTRAVIOLET AND X-RAY PHOTOELECTRON-SPECTROSCOPY MEASUREMENTS [J].

LAACHIR, A ;

PERRICHON, V ;

BADRI, A ;

LAMOTTE, J ;

CATHERINE, E ;

LAVALLEY, JC ;

ELFALLAH, J ;

HILAIRE, L ;

LENORMAND, F ;

QUEMERE, E ;

SAUVION, GN ;

TOURET, O .

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS, 1991, 87 (10) :1601-1609

[10] A NEW SINGLE-PHASE TETRAGONAL CEO2-ZRO2 SOLID-SOLUTION [J].

MERIANI, S .

MATERIALS SCIENCE AND ENGINEERING, 1985, 71 (1-2) :369-370