The first one consists of a porous tube covered with a thin film of catalyst oxide (Type-I), the second one is a non-porous tube of solid ion conductor covered with a catalyst layer (Type-II), and the third one is a non-porous tube made of perovskite-type mixed conductor which itself has activity for methane conversion (Type-III).
Herein, we describe how synchrotron-based NAP-XPS and impedance spectroscopy were performed simultaneously, enabling the investigation of changes in surface chemistry and in water splitting kinetics of the perovskite-type mixed conductor La0.6Sr0.4FeO3− δ (LSF) under electrochemical polarization in humid H2 atmospheres.
The effects of La0.8Sr0.2Mn0.8Cr0.2O3 addition, partial Ni substitution with La0.1Sr0.9TiO3 ionic and electronic mixed conductor and composition of apatite-type lanthanum silicate on catalytic properties and coking resistance were considered.
One-component ceramic membrane-reactor, constituting of the same type of Ca0.8Sr0.2Ti1−xFexO3−α perovskite-type oxide for the catalyst involving support oxides, i.e., Ni/Ca0.8Sr0.2Ti0.9Fe0.1O3−α, and the oxide ionic and electronic mixed conductor, i.e., Ca0.8Sr0.2Ti0.7Fe0.3O3−α, has been investigated for the partial oxidation of methane into synthesis gas in natural gas conversion process.
The material is found to be a mixed conductor whose ionic mobility is 1.5 times faster than electronic mobility.
Unfortunately, the set-up used did not permit to distinguish between electronic and ionic conductivity in a mixed conductor such as α-MoO3.
The structure, microstructure and low-temperature electrical properties of core shell-type mixed core shell-typed on lanthanumixedlate with Fe-doped grain boundaries are analyzed in depth.
This paper demonstrates that ion/electron mixed conductors (redox conductors) based on polymer electrolytes can be obtained by incorporating redox molecules into ion-conducting polymer phases.
It is shown that these electrodes can be considered either as porous blocking electrodes or as solid mixed conductors.
It is deduced that dual-phase membranes made of Fe-based perovskite oxides (such as Sm0.6Sr0.4FeO3, mixed conductors) and Ce-based fluorite oxides (such as Ce0.85Sm0.15O1.925, ionic conductors) have both good permeability and stability.
