Paper Titles

Effect of Ammonia Etching on Catalyst Nanoparticles Formation for Growth of Aligned Carbon Nanotubes
p.407

Effects of Heat Treatment on the Morphology of Primary α Phase and Hardness of B-Refined Al-7 wt% Si Alloy
p.412

Fabrication of Single-Negative Metamaterials Based on Coplanar Waveguide
p.418

Fabrication and Characterization of a Feldspar-Alumina for Dental Ceramic
p.424

Preparation of Three Different Sphere-Like Au/CeO₂ Catalysts and their Activity for the CO Oxidation
p.428

Microstructural Evolution in Void Coalescence Induced by Plate-Impact Loading in Ultrapure Aluminum
p.434

Module Partition Research for the Marine Drilling Rig
p.440

Research on Stamping Forming and Spring-Back of Automotive Panel
p.446

Laser Cladding of Zr₅₅Al₁₀Ni₅Cu₃₀/SiC Amorphous Composite Coatings on AZ91D Magnesium Alloy for Improvement of Wear Resistance
p.450

HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 160-162Preparation of Three Different Sphere-Like Au/CeO2...

Preparation of Three Different Sphere-Like Au/CeO₂ Catalysts and their Activity for the CO Oxidation

Article Preview

Abstract:

Three different CeO2 sphere nanomaterials (hollow sphere, flowerlike sphere, spherical cluster) were controllably synthesized by carbon sphere template method, hydrothermal and solvothermal method respectively. Then 2.5 wt% Au was doped on the supports by the deposition precipitation method and Au/CeO2 catalysts with three different morphologies were obtained. Composition, morphology and structure of these catalysts were characterized by the techniques of XRD, Raman, TPR, SEM and TEM, and the activity for CO oxidation of the catalysts was investigated. The catalytic test results indicated that the addition of Au could remarkably improve catalytic performance on CO oxidation. The activities of the three catalysts differ largely, the flowerlike Au/CeO2 catalyst had the highest activity for CO oxidation and its T100% was 29°C. The mechanism for the different activity of the catalysts was investigated. H2-TPR result indicated flowerlike had a more intensive peak at 125°C than others and it implied more reducible Au species in this case, that plays a vital role in the CO oxidation.

You might also be interested in these eBooks

Materials Science and Engineering Applications

Info:

Periodical:

Advanced Materials Research (Volumes 160-162)

Pages:

428-433

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.160-162.428

Citation:

Cite this paper

Online since:

November 2010

Authors:

Lei Wang, Guang Sheng Guo, Fu Bo Gu, Zhi Hua Wang

Keywords:

Au/CeO₂ Catalyst, Ceria, CO Oxidation, Flowerlike Sphere, Hollow Sphere, Spherical Cluster

Export:

RIS, BibTeX

Price:

Permissions CCC:

Request Permissions

Permissions PLS:

Request Permissions

Сopyright:

© 2011 Trans Tech Publications Ltd. All Rights Reserved

Share:

Citation:

[1] M. Haruta: Catal. Today, Vol. 36 (1997), p.153.

[2] T.V. Choudhary, D.W. Goodman: Catal. Today, Vol. 77 (2002), p.65.

[3] M. Date, M. Haruta: J. Catal, Vol. 201 (2001), p.221.

[4] M. Haruta, S. Tsubota, T. Kobayashi and B. Delmon: J. Catal., Vol. 144 (1993), p.175.

[5] E.E. Stangland, K.B. Stavens, R.P. Andres and W.N. Delgass: J. Catal., Vol. 191(2000), p.332.

[6] H.Y. Lin, Y.W. Chen: Ind. Eng. Chem. Res., Vol. 44(2005), p.4569.

[7] S.D. Gardner, G.B. Hoflund: Langmuir, Vol. 7 (1991), p.2140.

[8] R.M.T. Sanchez, A. Ueda, K. Tanaka, M. Haruta: J. Catal., Vol. 168 (1997), p.125.

[9] J. Guzman, B.C. Gates: Angew. Chem. Int. Ed., Vol. 42 (2003), p.690.

[10] N.S. Phala, G. Klatt, E. Van Steen and C.R.A. Catlow: Phys. Chem., Vol. 7 (2005), p.2440.

[11] T. Tabakova,V. Idakiev, and I. Mitov: Appl. Catal. A: Gen., Vol. 202 (2000), p.91.

[12] D. Terribile, A. Trovarelli, A. Primavera and G. Dolcetti: Catal. Today, Vol. 7 (1999), p.133.

[13] R.J.H. Grisel, B.E. Nieuwenhuys: Catal. Today, Vol. 64 (2001), p.69.

[14] T. Salama, R. Ohnishi, T. Shido and M. Ichikawa: Chem. Commun., Vol. (1997), p.105.

[15] A. Trovarelli: Catal. Rev. Sci. Eng., Vol. 38(1996), p.439.

[16] Q. Fu, H. Saltsburg, M. Flytzani-Stephanopoulos: Science, Vol. 301 (2003), p.935.

[17] M. Manzoli, F. Boccuzzi, and M. Flytzani-Stephanopoulos: J. Catal., Vol. 245(2007), p.308.

[18] Zhi Chen, Qiuming Gao: Appl. Catal. B: Environ., Vol. 84 (2008), p.790.

[19] A. Trovarelli: Catal. Rev. Sci. Eng., Vol. 38 (1996), p.439–520.

[20] S. Carrettin, J.M. Lopez Nieto, V.F. Puntes: Angew. Chem. Int. Ed., Vol. 43 (2004), p.2538.

[21] J. Guzman, S. Carrettin, A. Corma: J. Am. Chem. Soc., Vol. 127 (2005), p.3286.

[22] U.R. Pillai, S. Deevi: Appl. Catal. A: Gen., Vol. 299 (2006), p.266.

[23] X. S. Huang, H. Sun, L. C. Wang and Y. Cao: Appl. Catal. B: Environ., Vol. 90 (2009), p.224.

[24] Q. Yuan, H.H. Duan and C.H. Yan: J. Colloid and Interface Science, Vol. 335 (2009), p.151.

[25] F. Arena, P. Famulari and F. Frusteri: Appl. Catal. B: Environ., Vol. 66 (2006), p.81.

[26] X.M. Sun, J. F Liu, Y.D. Li: Chem. Mater., Vol. 18 (2006), p.3486.

[27] X.M. Sun, Y.D. Li,: Angew. Chem. Int. Ed. , Vol. 43 (2004), p.597.

[28] Gregorio Marba´n, Antonio B. Fuertes: Appl. Catal. B: Environ., Vol. 57 (2005), p.43.

[29] W.J. Shan, Z.C. Feng, Z. l. Li, J. Zhang, W.J. Shen .C. Li: J. Catal., Vol. 228 (2004), p.206.

[30] D. Andreeva, P. Petrova and M. Abrashev: Appl. Catal. B: Environ., Vol. 67 (2006), p.237.