Tantalum stabilized SrCoO3−δ perovskite membrane for oxygen separation

▶ A proper amount of Ta can stabilize the cubic perovskite structure of SrCoO3−δ. ▶ A highest oxygen permeation flux of 25 × 10−7 mol/s cm2 through SrCo0.9Ta0.1O3−δ membrane was obtained at 950 °C with a sweep He flow rate of 160 mL/min. ▶ SrCo0.9Ta0.1O3−δ (SCT) membrane is steadily operated for more than 520 h for oxygen separation with a stable permeation flux of 1.36 × 10−6 mol/s cm2.