Zr-substituted, Tm-doped SrCeO3 (SrCe0.95-xZrxTm0.05O3-d, 0 ≤ x ≤ 0.40) were synthesized via citrate complexing method, and the membranes of SrCe0.95-xZrxTm0.05O3-d were prepared by pressing followed by sintering. X-ray diffraction was used to characterize the phase structure of sintered membrane. The microstructure of the sintered membranes was studied by scanning electron microscopy. Protonic and electronic conductivities were measured under different circumstance. Hydrogen permeation through the SrCe0.75Zr0.20Tm0.05O3-d membranes was carried out using gas permeation setup. Hydrogen permeation fluxes of the SrCe0.75Zr0.20Tm0.05O3-d membrane reached up to 0.042ml/min.cm2 at a H2 partial pressure of 0.4 x 105Pa at 900C. The hydrogen permeation fluxes obtained were slightly lower than that of SrCe0.95Tm0.05O3-d on the same orders, and Zr doping could increase the chemical stability of the SrCe0.75Zr0.20Tm0.05O3-d membranes.

Protonic and Electronic Conductivities and Hydrogen Permeation of SrCe0.95-xZrxTm0.05O3-δ (0≤x≤0.40) Membrane. J.Liang, L.Mao, L.Li, W.Yuan: Chinese Journal of Chemical Engineering, 2010, 18[3], 506-10