High H2 permeability in F-doped BaZr0.7Ce0.2Y0.1O3-δ perovskite membranes via thermodynamic controlled sintering

A raw hydrogen mixture frequently results in a reduction in conversion efficiency and the generation of undesired by-products. The application of advanced membrane technology has the potential to offer an economically viable solution for the recovery of hydrogen from such mixtures. BaZr1-x-yCexYyO3-delta is increasingly regarded as an optimal perovskite hydrogen permeable membrane. Nevertheless, the main drawback to its use in a larger scale is the extremely low hydrogen permeability and stability. An original perovskite material is proposed in this study, BaZr0.7Ce0.2Y0.1O3-delta-Fx. A thermodynamic-controlled sintering strategy (TCS) has been employed to inhibit the evaporation of metals from ceramic solids. The TCS directly caused the hydrogen permeation flux to reach 1.07 ml<middle dot>min-1 cm-2, representing a fourfold improvement. Furthermore, F-doping demonstrated enhanced performance at low and medium temperatures. The aforementioned successful strategy provides an effective path for the tailoring of perovskite materials and promotes its application for the industrial-scale separation of hydrogen.