Effect of gallia doping on the acid-base and redox properties of ceria

被引：38

作者：

Collins, Sebastian ^{[1
]}

Finos, Gisela ^{[1
]}

Alcantara, Rodrigo ^{[2
]}

del Rio, Eloy ^{[3
]}

Bernal, Serafin ^{[3
]}

Bonivardi, Adrian ^{[1
]}

机构：

[1] Inst Desarrollo Tecnol Ind Quim INTEC UNL CONICET, RA-3000 Santa Fe, Argentina

[2] Univ Cadiz, Fac Ciencias, Dpto Fis, E-11510 Puerto Real, Spain

[3] Univ Cadiz, Fac Ciencias, Dpto Ciencias Mat Ingn Met & Quim Inorgan, E-11510 Puerto Real, Spain

来源：

APPLIED CATALYSIS A-GENERAL | 2010年 / 388卷 / 1-2期

关键词：

Cerium oxide; Gallium oxide; Acid-base; Redox; Infrared; CARBON-DIOXIDE ADSORPTION; GAS SHIFT REACTION; X-RAY; CATALYSTS; SURFACE; DEACTIVATION; REDUCTION; OXIDES; RAMAN; CO;

D O I：

10.1016/j.apcata.2010.08.050

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：

This work presents the synthesis and characterization of cerium oxide doped with gallium, which were prepared by co-precipitation in basic aqueous solution followed by calcination at 773 K. XRD and Raman spectroscopy suggested that Ga(III) cations were incorporated into the ceria crystal structure. Moreover, surface Ga-H species were detected by FTIR with a 100 cm(-1) downshift of the v(Ga-H) peak, which indicated that Ga(III) were incorporated onto the surface lattice of the ceria. Results of CO2 and CO chemisoption, as well as, TPR-H-2 and TPR-CO, showed that the acid-base (decreased basicity) and redox (enhanced reducibility) properties of the gallium-doped ceria materials were modified as compared with the pure cerium dioxide. The catalytic oxidation of CO was investigated over the oxides. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：202 / 210

页数：9

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