Self-combustion synthesis and oxygen storage properties of mesoporous gadolinia-doped ceria nanotubes

被引：10

作者：

Yang, Tao ^{[1
]}

Xia, Dingguo ^{[1
]}

机构：

[1] Beijing Univ Technol, Coll Environm & Energy Engn, Beijing 100124, Peoples R China

来源：

MATERIALS CHEMISTRY AND PHYSICS | 2010年 / 123卷 / 2-3期

基金：

北京市自然科学基金;

关键词：

Oxides; Chemical synthesis; Electron microscopy (TEM and SEM); Microstructure; CEO2-ZRO2; SOLID-SOLUTIONS; OXIDATION; OXIDE; CATALYSTS; CAPACITY; BEHAVIOR; POWDERS;

D O I：

10.1016/j.matchemphys.2010.05.066

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Ethyl glycol and citric acid, along with metal nitrates have been used to prepare Ce0.9Gd0.1O2-x nanotubes directed at the anodic alumina oxide (AAO) template by combustion route. The tubes produced by the self-combustion route do not need any further calcination step. XRD patterns show the doped-ceria tubes have the flurite-type structure and no impurities are detected. The specific surface area of the tube is 112.7 m(2) g(-1) and N-2 adsorption-desorption profiles of the BET measurement shows the tubes are mesoporous. The largest aspect ratio of a nanotube reaches 20:1 and the TEM observation reveals the hollow structure. The Ce:Gd molar ratio calculated from the EDS and ICP-AES is 9:1 and the selected area electron diffraction confirms the flurite-type structure from the XRD characterization. The combined thermogravimetry-differential thermal analysis has been carried out to study the combustion reactions in the tube-forming process. The thermal stability of the nanotubes under both reductive and oxidative atmospheres is tested using the dynamic reduction/reoxidation reactions. At last, the oxygen storage capacity (OSC) of the nanotubes is calculated to be 695 mu mol-O-2 g(-1) from the temperature-programed reduction reaction. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：816 / 820

页数：5

共 19 条

[1] AN UNUSUAL PROMOTION OF THE REDOX BEHAVIOR OF CEO2-ZRO2 SOLID-SOLUTIONS UPON SINTERING AT HIGH-TEMPERATURES [J].

BALDUCCI, G ;

FORNASIERO, P ;

DIMONTE, R ;

KASPAR, J ;

MERIANI, S ;

GRAZIANI, M .

CATALYSIS LETTERS, 1995, 33 (1-2) :193-200

[2]

Bernal S, 1999, CATAL TODAY, V50, P173

[3] GLYCINE NITRATE COMBUSTION SYNTHESIS OF OXIDE CERAMIC POWDERS [J].

CHICK, LA ;

PEDERSON, LR ;

MAUPIN, GD ;

BATES, JL ;

THOMAS, LE ;

EXARHOS, GJ .

MATERIALS LETTERS, 1990, 10 (1-2) :6-12

[4] A NOVEL AND SIMPLE ROUTE TO CATALYSTS WITH A HIGH OXYGEN STORAGE CAPACITY - THE DIRECT ROOM-TEMPERATURE SYNTHESIS OF CEO2-ZRO2 SOLID-SOLUTIONS [J].

DELEITENBURG, C ;

TROVARELLI, A ;

ZAMAR, F ;

MASCHIO, S ;

DOLCETTI, G ;

LLORCA, J .

JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, 1995, (21) :2181-2182

[5] SINTERING OF ZRO2-CEO2 SPHERICAL POWDERS PREPARED BY A WATER EXTRACTION VARIANT OF THE SOL-GEL PROCESS [J].

DEPTULA, A ;

CAREWSKA, M ;

OLCZAK, T ;

LADA, W ;

CROCE, F .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1993, 140 (08) :2294-2297

[6] THE PREPARATION OF ULTRAFINE CERIA-STABILIZED ZIRCONIA PARTICLES COATED WITH YTTRIA [J].

DJURICIC, B ;

MCGARRY, D ;

PICKERING, S .

JOURNAL OF MATERIALS SCIENCE LETTERS, 1993, 12 (16) :1320-1323

[7] Low-temperature direct synthesis of nanoparticles of fluorite-type ceria-zirconia solid solutions by "forced cohydrolysis at 100°C [J].

Hirano, M ;

Miwa, T ;

Inagaki, M .

JOURNAL OF SOLID STATE CHEMISTRY, 2001, 158 (01) :112-117

[8] Oxidation behavior of reduced (CeO2)1-x-(ZrO2)x (x=0, 0.2, 0.5) catalysts [J].

Kakuta, N ;

Ikawa, S ;

Eguchi, T ;

Murakami, K ;

Ohkita, H ;

Mizushima, T .

JOURNAL OF ALLOYS AND COMPOUNDS, 2006, 408 :1078-1083

[9] Use of CeO2-based oxides in the three-way catalysis [J].

Kaspar, J ;

Fornasiero, P ;

Graziani, M .

CATALYSIS TODAY, 1999, 50 (02) :285-298

[10]

Machida M, 2006, J MATER CHEM, V16, P3084, DOI 10.1039/b605518d

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