  High stability and oxygen permeability are two prominent requirements for the
oxygen transport membrane candidates used as industrialization. Herein, we
report several composite membranes based on
xwt.%Ce0.9Pr0.1O2(CPO)-(100-x)wt.%Pr0.6Sr0.4Fe0.8Al0.2O3(PSFAO) (x = 50, 60 and
75) prepared via a modified Pechini method. Oxygen permeability test reveals
that the 60CPO-40PSFAO composition exhibits the highest oxygen permeability.
The oxygen permeation flux through the optimal uncoated 0.33 mm-thickness
60CPO-40PSFAO composite can reach 1.03 mL cm-2 min-1 (over the general
requirement value of 1 mL cm-2 min-1) in air/He atmosphere at 1000 {\deg}C. In
situ XRD performance confirms the optimal 60CPO-40PSFAO sample shows excellent
stability in CO2-containing atmospheres. The 60CPO-40PSFAO membrane still
exhibits simultaneously excellent oxygen permeability and phase stability after
operating for over 100 h at air/CO2 condition at 1000 {\deg}C, which further
indicates that the 60CPO-40PSFAO composite is likely to be used for oxygen
supply in CO2 capture
