info:eu-repo/semantics/article
Cermets Ni/(Ce0.9Ln0.1O1.95) (Ln = Gd, La, Nd and Sm) prepared by solution combustion method as catalysts for hydrogen production by partial oxidation of methane
Fecha
2018-08-30Registro en:
Alvarez-Galvan, Consuelo; Falcon, Horacio; Cascos, Vanessa; Troncoso, Loreto; Perez-Ferreras, Susana; et al.; Cermets Ni/(Ce0.9Ln0.1O1.95) (Ln = Gd, La, Nd and Sm) prepared by solution combustion method as catalysts for hydrogen production by partial oxidation of methane; Pergamon-Elsevier Science Ltd; International Journal of Hydrogen Energy; 43; 35; 30-8-2018; 16834-16845
0360-3199
CONICET Digital
CONICET
Autor
Alvarez-Galvan, Consuelo
Falcon, Horacio
Cascos, Vanessa
Troncoso, Loreto
Perez-Ferreras, Susana
Capel-Sanchez, Maricarmen
Campos Martín, Jose Miguel
Alonso, José Antonio
Fierro, José Luis G.
Resumen
Catalysts based on Ni/(Ce0.9Ln0.1O1.95) (Ln = Gd, La, Nd and Sm) have been developed and tested for hydrogen production by partial oxidation of methane. The synthesis method (SCS, solution combustion synthesis) produces macroporous composite materials composed of ceramic (cer, Ce0.9Ln0.1O1.95) and metallic (met, Ni) phases, without the need of an activation stage prior to the catalytic reaction. The catalysts have been characterized by different techniques: X-ray diffraction, N2 adsorption-desorption, Hg porosimetry, Scanning Electron Microscopy, Temperature Programmed Reduction, H2 and O2 pulse chemisorption, X-ray photoelectron spectroscopy and Raman spectroscopy. With the exception of the lanthanum-loaded catalyst, the catalysts are highly active, selective and stable; being the one doped with gadolinium the most efficient. Correlations structure-activity point out that the excellent catalytic performance is related to the high catalytic surface area per unit mass of catalyst and to an appropriate balance of nickel dispersion to oxygen vacancies of the support.