Acceptor doped LaCrO3 is a promising material for dense, ceramic hydrogen permeable membranes, displaying hydrogen flux in the order of 10(-4) ml min(-1) cm(-1) in a 10% H-2+2.5% H2O/dry Ar gradient at 1000 degrees C. In this work we have characterized the ambipolar proton electron hole conductivity in La0.87Sr0.13CrO3-delta by means of hydrogen flux measurements. Proton transport parameters were extracted, yielding a pre-exponential factor of 3 cm(2) K V-1 s(-1) and an enthalpy of mobility of 65 kJ mol(-1). Hydrogen flux measurements showed that applying a layer of Pt on both feed and sweep side surfaces significantly altered the temperature dependency and increased the hydrogen flux in a 550 mu m thick membrane. This indicates that surface kinetics will limit the hydrogen flux in uncoated membranes. From hydrogen surface exchange measurements, a surface exchange coefficient ranging from 10(-10) to 10(-8) mol cm(-2)s(-1) at 325-600 degrees C was obtained. (C) 2014 Elsevier B.V. All rights reserved.