Study on Catalytic Properties of Nano-CeO2-ZrO2 Mixed Oxides Prepared by Modified Sol-Gel Method

doi:10.3724/SP.J.1077.2010.00820

Journal of Inorganic Materials ›› 2010, Vol. 25 ›› Issue (8): 820-824.DOI: 10.3724/SP.J.1077.2010.00820

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Study on Catalytic Properties of Nano-CeO₂-ZrO₂ Mixed Oxides Prepared by Modified Sol-Gel Method

YUAN Wen- Hui¹, ZHOU Chen-Chen¹, LI Li²

(1. School of Chemistry and Chemical Engineering, South China University of Technology, Guangzhou 510640, China; 2. College of Environmental Science and Engineering, South China University of Technology, Guangzhou 510640, China)

Received:2009-12-15 Revised:2010-02-06 Published:2010-08-20 Online:2010-07-19

Abstract

Abstract:

The nanosized CeO₂-ZrO₂solid solutions were prepared by modified Sol-Gel method with Ce(NO₃)₃·6H₂O and ZrO(NO₃)₂·2H₂O as starting materials. The effects of different Ce/Zr molar ratio and calcination temperature on the particle size, crystal type and reducibility were studied to obtain optimal preparation condition. CeO₂-ZrO₂ solid solution was characterized by XRD, SEM and TPR measurements. Results show that the highest specific surface area of CeO₂-ZrO₂ solid solution is 92m²/g while Ce/Zr molar ratio is 3: 1. CeO₂-ZrO₂solid solution prepared by modified Sol-Gel method is fluorite structured. TPR results show that CeO₂-ZrO₂solid solution calcined at 450℃ has good catalytic reducibility. Catalytic properties are estimated through a fix-bed reactor under atmospheric pressure. CeO₂-ZrO₂solid solution with Ce/Zr molar ratio of 3: 1 show higher catalytic activity and selectivity to ethanol steam reforming reaction than those of CeO₂ and other molar ratio CeO₂-ZrO₂ solid solution. Both reducibility and heat stability of CeO₂can be improved with the addition of ZrO₂.

Key words: hydrogen production, steam reforming of ethanol, nanosized CeO₂-ZrO₂, modified Sol-Gel method

CLC Number:

TQ174

YUAN Wen- Hui, ZHOU Chen-Chen, LI Li. Study on Catalytic Properties of Nano-CeO₂-ZrO₂ Mixed Oxides Prepared by Modified Sol-Gel Method[J]. Journal of Inorganic Materials, 2010, 25(8): 820-824.

References

[1]Kaspar J, Fornasiero P, Hickey N. Automotive catalytic converters: current status and some perspectives.Catalysis Today,2003, 77(4):419-449
[2]Steele B C H, Heinzel A. Materials for fuel-cell technologies.Nature,2001, 414(6861):345-352
[3]Ramamoorthy R, Dutta P K, Akbar S A. Oxygen sensors: materials, methods, designs and applications.J. Mater. Sci,2003, 38(21):4271-4282
[4]Bocanegra-Berna M H. Review phase transitions in zirconium dioxide and related materials for high performance engineering ceramics.J. Mater. Sci,2002, 37(22):4947-4971
[5]Perrichon V, Retailleau L, Bazin P, et al. Metal dispersion of CeO2–ZrO2 supported platinum catalysts measured by H2 or CO chemisorption.Applied Catalysis A,2004, 260(1):1-8
[6]Andreeva D, Idakiev V, Tabakova T. Low-temperature water-gas shift reaction over Au/CeO2 catalysts.Catal. Today,2002, 72 (l/2):51-57
[7]Monte R D, Kaspar J. Nanostructured CeO2–ZrO2 mixed oxides.Journal of Materials Chemistry,2005, 15(6):633-648
[8]李霞章, NI Chao-Ying, 陈志刚(LI Xia-Zhang, et al). 晶态骨架孔CeO2和CeO2-ZrO2的合成与结构表征复合氧化物性能的影响. 无机材料学报(Journal of Inorganic Materials), 2008, 23(5): 986-990.
[9]Potdar H S, Deshpande S B, Deshpande A S. Preparation of ceria–zirconia (Ce0.75Zr0.25O2) powders by microwave–hydrothermal (MH) route. Materials Chemistry and Physics,2002, 74(3):306-312
[10]Torng S, Miyazawa K, Sakuma T. The diffusionless cubic-to- tetragonal phase transition in near-stoichiometric ZrO2-CeO2.Ceram. Int,1996, 22(4):309-315
[11]Sonia L, Claudio A, Roberto R, et al. Obtaining CeO2–ZrO2 mixed oxides by coprecipitation: role of preparation conditions.Applied Catalysis B,2005, 58 (3/4):203-210
[12]Alifanti M, Baps B, Blangenois N, et al. Characterization of CeO2-ZrO2 mixed oxides: comparison of the citrate and Sol-Gel preparation methods.Chem. Mater,2003, 15(2):395-403
[13]袁文辉, 罗仡科. CeO2-ZrO2固相溶液的制备和贮氧能力的研究. 离子交换与吸附, 2007, 23(4): 322-329.
[14]Thammachart M, Meeyoo V, Risksomboon T, et al. Catalytic activity of CeO2–ZrO2 mixed oxide catalysts prepared via Sol–Gel technique: CO oxidation.Catalysis Today,2001, 68(1/2/3):53-61
[15]Lin Y S, Chang C H, Gopalan R. Improvement of thermal stability of porous nanostructured ceramic membranes.Ind. Eng. Chem. Res,1994, 33(4):860-870

Study on Catalytic Properties of Nano-CeO₂-ZrO₂ Mixed Oxides Prepared by Modified Sol-Gel Method

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