Artículos de revistas
CO preferential oxidation (CO-PROx) on La(1-x)Ce(x)NiO(3) perovskites
Fecha
2011Registro en:
CATALYSIS COMMUNICATIONS, v.12, n.8, p.703-706, 2011
1566-7367
10.1016/j.catcom.2010.12.022
Autor
MALUF, S. S.
ASSAF, E. M.
Institución
Resumen
La(1-x)Ce(x)NiO(3) perovskites have been prepared, characterized by XRD. TPR and surface area and tested as catalysts for CO-PROx, with a feed of 2.5% CO, 5% O(2), 33% H(2) and N(2) to 100%. The samples exhibited an XRD pattern typical of the perovskite, with traces of NiO in the LaNiO(3) and La(0.95)Ce(0.05)NiO(3) samples, with some La(2)NiO(4) in the La(0.90)Ce(0.10)NiO(3) sample. All samples were active, but the perovskites with cerium showed good catalytic activity, demonstrating the promoter effect of cerium. The highest conversion of CO and H(2) was obtained with La(0.95)Ce(0.05)NiO(3), probably due to a synergy between Ni and Ce that enhanced O(2) mobility. (c) 2010 Elsevier B.V. All rights reserved.