INVESTIGADORES
MOGNI Liliana Veronica
congresos y reuniones científicas
Título:
Increasing Conductivity in Proton Conductors BaCeO3-δ doped with Pr
Autor/es:
BASBUS, J. F.; L. MOGNI; A. CANEIRO
Lugar:
San Francisco
Reunión:
Congreso; 224th ECS meeting; 2013
Institución organizadora:
Electrochemical Society
Resumen:
In this work we explore the effect of
partial substitution of Ce for Pr ions in BaCe1-xPrxO3-d (0 ≤ x ≤0.8) perovskites with the aim
of increasing the oxygen vacancies concentration and H+ charge
carriers. The oxides were obtained by Pechini combustion method and sintered at
1350 °C. The Pr incorporation improves the capability of to obtain dense
samples at this temperature. Crystal structure were studied by X-ray diffraction,
while morphology by SEM. The conductivity was studied by Electrical Impedance
Spectroscopy (EIS) under 20 % O2/Ar and 10 % H2/Ar, both with
2% humidity. We found that the Pr content diminished the lattice parameters,
increase the sintering capacity and the conductivity under wet oxidant
atmosphere, but it decreases the stability under reducing atmosphere.
