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Catalytic decomposition of methane over cerium-doped Ni Catalysts

Published online by Cambridge University Press:  01 February 2011

Oscar A. González ,
Miguel A. Valenzuela  and
Jin-An Wang
Oscar A. González
Affiliation:
[email protected]
Miguel A. Valenzuela
Affiliation:
[email protected], Instituto Politécnico Nacional, IPN-ESIQIE, Edificio 8, Tercer piso, Zacatenco, Mexico, D.F., 07738, Mexico
Jin-An Wang
Affiliation:
[email protected]
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Abstract

Si-Ce-O mixed solids (50, 30, 10 and 5, Si/Ce molar ratio) were prepared by using Ce(NO3)3·6H2O as cerium source, tetraethyl orthosilicate (TEOS) as Si precursor and cetyltrimethylammonium bromide (CTABr) as synthesis template. The Ni catalysts were prepared by impregnation of the supports using Ni-acetilacetonate (30 wt.% Ni) as Ni source. The samples were characterized by: X-ray diffraction, temperature-programmed reduction (TPR), and TEM. The nickel reduction degree decreased with the addition of cerium, even in low concentration. When methane was decomposed over all the catalysts only hydrogen was obtained as a gaseous product. The addition of cerium brought about a significant increase in stability compared with Ni/SiO2 catalyst. These preliminary results indicated that CeO2 addition improves the dispersion of Ni particles leading to a better distribution of deposited carbon and increasing the lifetime of Ni particles.

Keywords

catalyticNiH
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 885: Symposium A – The Hydrogen Cycle – Generation, Storage and Fuel Cells , 2005 , 0885-A09-49
Copyright
Copyright © Materials Research Society 2006

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