A mixed proton and electron conductor BaCe0.05Tb0.05Zr0.1O3-delta (BCTZ) has been developed by the partial substitution of Ce with Zr in BaCe0.95Tb0.05O3-delta (BCT) to improve the phase structure stability of BCT. The BCTZ membranes with asymmetric structure have been successfully prepared and evaluated for hydrogen separation. A stable hydrogen permeation flux has been found over 370 h operation. The improved stability recommends BCTZ for a potential application in the hydrogen separation. (C) 2015 Elsevier B.V. All rights reserved.