A mixed proton–electron conducting perovskite was synthesized by liquid-citrate method and the corresponding membrane was prepared by pressing followed by sintering. The hydrogen permeability of BaCe0.9Yb0.1O3-δ was studied as a function of temperature and hydrogen partial pressure (PH2) gradient. Using 100% dry hydrogen at 1173 K, the hydrogen permeation rate of dense membranes (1.63 mm thick) for a mixture of 60% H2/He was 0.000293 mol/(m2 s). The phase structure of powder was characterized by X-ray diffraction and thermogravimetry (TG). Scanning electron microscopy (SEM) was used to investigate the microstructure of sintered membrane. Activation energy estimated with Arrhenius equation was 29 kJ/mol.
 Y. Liu, X. Tan & K. Li, “Mixed Conducting Ceramics for Catalytic Membrane Processing Catalysis Reviews”, 48, pp. 145–198, 2009.
 S. Cheng, Vineet K. Gupta & Jerry Y.S. Lin, “Synthesis and hydrogen permeation properties of asymmetric proton-conducting ceramic membranes”, Solid State Ionics 176 , pp. 2653– 2662, 2005.
 Shane E., Roark, Richard Mackay & Anthony F. Sammells, Hydrogen separation membranes for vision 21 fossil fuel plants, Eltron Research Inc.
 Li J., Yoon H., Tak-Keun Oh & Eric D. Wachsman, “High temperature SrCe0.9Eu0.1O3-δ proton conducting membrane reactor for H2 production using the water–gas shift reaction”, Applied Catalysis B: Environmental 92, pp. 234–239, 2009.
 Matsuka M. , Roger D. Braddock , Matsumoto H., Sakai T., Igor E. Agranovski , Ishihara T., “Experimental and theoretical studies of hydrogen permeation for doped strontium cerates”, Solid State Ionics 181,pp. 1328–1335, 2010.
 Songa S.-J., Wachsmana E.D., J. Rhodesa, Dorrisb S.E. & Balachandranb U., “Hydrogen permeability of SrCe1-xMxO3-δ (x=0.05, M=Eu, Sm)”, Solid State Ionics, 167, pp. 99–105, 2004.
 Evdou A., Nalbandian L., Zaspalis V.T., “Perovskite membrane reactor for continuous and isothermal redox hydrogen production from the dissociation of water, Journal of Membrane Science”, 325, pp. 704–711, 2008.
 Kniep J. & Lin Y. S., “Effect of Zirconium Doping on Hydrogen Permeation through Strontium Cerate Membranes”, Ind. Eng. Chem. Res., 49, pp. 2768–2774, 2010.
 Tsai C.-L., Kopczyk M., Smith R.J. & Schmidt V.H., “Low temperature sintering of Ba(Zr0.8−xCexY0.2)O3−δ using lithium fluoride additive”, Solid State Ionics 181 pp. 1083–1090, 2010.
 Cheng Sh., Vineet K. Gupta & Jerry Y.S. Lin, “Synthesis and hydrogen permeation properties of asymmetric proton-conducting ceramic membranes”, Solid State Ionics 176, pp. 2653–2662, 2005.
 Cheng Sh., Vineet K. Gupta, Jerry Y.S. Lin, “Synthesis and hydrogen permeation properties of asymmetric proton-conducting ceramic membranes”, Solid State Ionics 176, pp. 2653–2662, 2005.
 Matsuka M., Roger D. Braddock, Matsumoto H., Sakai T., Igor E. Agranovski & Ishihara T., “Experimental and theoretical studies of hydrogen permeation for dopedstrontium cerates”, Solid State Ionics 181, pp. 1328–1335, 2010.
 Matsuka M., Igor E. Agranovski, Roger D. Braddock, “Preparation of asymmetric perovskite-type membranes by a settlement method”, Ceramics International 36, pp. 643–651, 2010.
 Glenn C. Mather, Poulidi D., Thursfield A., María Jesús Pascual, José Ramón Jurado & Ian S. Metcalfe, “Hydrogen-permeation characteristics of a SrCeO3-based ceramic separation membrane: Thermal”, ageing and surface-modification effects, Solid State Ionics 181, pp. 230–235, 2010.
 Kawamura Y., Isobe K. & Yamanishi T., “Mass transfer process of hydrogen via ceramic proton conductor membrane of electrochemical hydrogen pump”, Fusion Engineering and Design 82, pp.113–121, 2007.
 Osman N. & Talib I. A. & H. Hamid A., “Properties of sol–gel prepared BaCeO3 solid electrolyte using acetate precursors”, Ionics 15, pp. 203–208, 2009.
 Hughes S.W., Archimedes revisited: a faster, better, “cheaper method of accurately measuring the volume of small objects”, Phys. Educ. 40, pp. 468–474, 2005.
 Askeland D.R. & Phule P.P., The Science and Engineering of Materials, Thomson, Australia, 2006.
 Cai Mingya, Liu S., Efimov K., Caro J., Feldhoff A. & Wang H., “Preparation and hydrogen permeation of BaCe0.95Nd0.05O3−δ membranes”, Journal of Membrane Science 343, pp. 90–96, 2009.
 Li G.T., Xiong G.X., Sheng S.S. & Yang W.S., “Hydrogen permeation properties of perovskite-type BaCe0.9Mn0.1O3−δ dense ceramic membrane”, Chin. Chem. Lett. 12, pp. 937, 2001.
 Iwahara H., Esaka T., Uhida H., Yamauchi T. & Ogaki K., Solid State Ionics, pp. 18–19, 1003, 1986.
 Song S.-J., Wachsman E.D., Rhodes J., Dorris S.E. & Balachandran U., “Hydrogen permeability of SrCe1_xMxO3_d (x=0.05, M=Eu, Sm)”, Solid State Ionics 167, pp. 99–105, 2004.