화학공학소재연구정보센터
Solid State Ionics, Vol.283, 21-29, 2015
Synthesis and properties of La0.05Ba0.95Ti1-xMyO3 (M = Mn, Ce) as anode materials for solid oxide fuel cells
Stoichiometric and sub-stoichiometric lanthanum barium titanates (LBT) of perovskite structure type, substituted or not with Mn and/or Ce at the Ti-site, were prepared by sol-gel route with heat treatment in air. All the compounds display a cubic Pm-3m symmetry, which remains stable in reducing atmosphere. Whereas Mn substitution highly promotes the reducibility of the material, the electrical and electrochemical performance of Mn-doped compounds is decreased with respect to non-doped sub-stoichiometric LBT. In contrast, the electrical conductivity and resistance polarization of Ce-substituted LBT are close to those of non-doped LBT and Ce-ubstituted LBT appears especially efficient in improving the catalytic properties for methane steam reforming and avoiding carbon formation. (C) 2015 Elsevier B.V. All rights reserved.