The shortage of traditional energy and the pollution caused by the direct combustion of fossil fuels make it necessary to explore new alternative energy sources. Hydrogen, which is non-toxic, pollution-free and widely available, is therefore an important vehicle for the third energy revolution. Since CO, CO2 and other impurities will be produced in industrial hydrogen production, it is essential to improve the concentration of hydrogen and remove these impurities. Mixed conducting hydrogen separation membranes are one of the best choices for application in this process because of its high efficiency in hydrogen separation. By doping at the " B" site, the single-phase perovskite structure BaCeO3 has good ionic conductivity and high hydrogen permeability, but this kind of material has poor chemical stability in wet CO2 atmosphere, which can not meet the needs of practical application. In view of these problems, reasonable incorporation of other ions and metal phases can effectively improve hydrogen permeability or chemical stability. In this work, Ba Ce0.7 In0.1 Ta0.1Y0.1 O3-δ powder was prepared by sol-gel method, and then mixed with Ni powder to prepare proton-electron mixed conducting cermet hydrogen separation membrane. The phase structure and microstructure of the samples were characterized by XRD and SEM, respectively. Furthermore, the electrical conductivity, hydrogen permeability, and short-term stability in wet CO2 environment were also tested. The results showed that The co-doping of In3+ and Ta5+ ions not only improved the sintering activity, but also improved the chemical stability of the hydrogen separation membrane in the wet CO2 environment. © 2023 Cailiao Daobaoshe/ Materials Review. All rights reserved.
