Physical and electrochemical properties of alkaline earth doped, rare earth vanadates

摘要: Abstract The effect of partial substitution alkaline earth (AE) ions, Sr 2+ and Ca , for the rare (RE) La 3+ Ce Pr Sm on physical properties REVO 4 compounds were investigated. use Pechini method to synthesize vanadates allowed high levels AE be obtained. Coulometric titration was used measure redox isotherms these materials showed that addition ions increased both reducibility electronic conductivity under typical solid oxide fuel cell (SOFC) anode conditions, through formation with mixed vanadium valence. In spite their conductivity, -yttira stabilized zirconia (YSZ) composite anodes exhibited only modest performance when in SOFCs operating H 2 at 973 K due low catalytic activity. High obtained, however, after a small amount catalytically active Pd anode.