RT Journal Article
T1 Metal-Doping of La5.4MoO11.1 Proton Conductors: Impact on the Structure and Electrical Properties.
A1 López Vergara, Adrián
A1 Porras-Vázquez, José Manuel
A1 Vøllestad, Einar
A1 Canales-Vázquez, J.
A1 Ramírez-Losilla, Enrique
A1 Marrero-López, David
K1 Separación por membrana
K1 Química organometálica
AB La5.4MoO11.1 proton conductors with differentmetal doping (Ca2+, Sr2+, Ba2+, Ti4+, Zr4+, and Nb5+) havebeen prepared and structurally and electrically characterized.Different polymorphs are stabilized depending on the dopingand cooling rate used during the synthesis process. The mostinteresting results are obtained for Nb-doping,La5.4Mo1−xNbxO11.1−x/2, where single compounds are obtainedin the compositional range 0 ≤ x ≤ 0.2. These materials arefully characterized by structural techniques such as X-ray andneutron powder diffraction and transmission electron microscopy, which independently confirm the changes of polymorphism.Scanning electron microscopy and impedance spectroscopy measurements in dry/wet gases (N2, O2, and 5% H2−Ar) showedan enhancement of the sinterability and electrical properties of the materials after Nb-doping. Conductivity measurementsunder very reducing conditions revealed that these materials are mixed ionic-electronic conductors, making them potentialcandidates for hydrogen separation membranes.
PB American Chemical Society
YR 2018
FD 2018-10-03
LK https://hdl.handle.net/10630/28445
UL https://hdl.handle.net/10630/28445
LA eng
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 19 ene 2026