Lead and tungsten double stabilizing cobalt‐based perovskite oxygen permeation membranes for clean energy delivery

In this work, a double site stabilizing cobalt-based perovskite strategy is proposed to enable the feasibility of the oxygen separation membrane. In order to achieve the excellent material stability, the inherently robust lead and tungsten were selected to stabilize cobalt-containing perovskite, respectively. PbxSr1−xCo1−yWyO3−δ (PSCW, 0 ≤ x, y ≤ 1) oxide was prepared by wet chemical process. The oxygen permeation test indicated that Pb and W double site stabilizing strategy is enabling the perovskite membranes to work with decent JO2 over ~2.0 mL cm−2 min−1 observed at 850°C. In addition, the robustness of the PSCW membrane was confirmed by long-term test against erosive gases (CO2 and H2O) as the oxygen fluxes of Pb0.5Sr0.5Co0.9W0.1O3−δ (PSCW5-5-9-1) membranes reverted back to the initial values of 1.91 mL cm−2 min−1 as these erosive gases were turned off. This result suggests that the double site Pb and W stabilizing technology may open a way to advance the viability of the ceramic membrane technology.