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The effect of the cerium precursor and the carbon surface chemistry on the dispersion of ceria on activated carbon

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Abstract

Activated carbon-supported cerium dioxide (CeO2/C) was prepared by impregnation of a commercial support (Norit R2030) with aqueous solutions of two different cerium precursors, [(NH4)2Ce(NO3)6] and Ce(NO3)3·6H2O. The effect of carbon surface chemistry on the dispersion of ceria was studied by using two different carbon supports, the R2030 and the same material after an oxidation treatment with H2O2. Thus, four samples were obtained by combining the precursors and the supports. The prepared materials were characterized by thermogravimetry, nitrogen adsorption isotherms (77 K), X-ray diffraction, temperature-programmed desorption, temperature-programmed reduction and transmission electron microscopy, in order to study the degree of ceria dispersion over the supports. It was found that the best results in terms of ceria dispersion were obtained for the material prepared with the oxidized carbon and ammonium cerium nitrate as cerium precursor.

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Acknowledgements

Financial support from the Ministerio de Educación y Ciencia (Spain), Projects BQU 2003-06150 and MAT2004-03480-C02-02, and the Network of Excellence InsidePores, European Commission Contract No. NMP3-CT2004-500895, is gratefully acknowledged.

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Authors and Affiliations

  1. Departamento de Química Inorgánica, Universidad de Alicante, Apartado 99, 03080, Alicante, Spain

    Enrique V. Ramos-Fernández, Juan C. Serrano-Ruiz, Joaquín Silvestre-Albero, Antonio Sepúlveda-Escribano & Francisco Rodríguez-Reinoso

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  1. Enrique V. Ramos-Fernández
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  2. Juan C. Serrano-Ruiz
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  3. Joaquín Silvestre-Albero
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  4. Antonio Sepúlveda-Escribano
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  5. Francisco Rodríguez-Reinoso
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Correspondence to Antonio Sepúlveda-Escribano.

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Ramos-Fernández, E.V., Serrano-Ruiz, J.C., Silvestre-Albero, J. et al. The effect of the cerium precursor and the carbon surface chemistry on the dispersion of ceria on activated carbon. J Mater Sci 43, 1525–1531 (2008). https://doi.org/10.1007/s10853-007-2361-8

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  • DOI: https://doi.org/10.1007/s10853-007-2361-8

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