Аннотация:In the present work, the combination of deformation and annealings under different conditions is used to prepare the Pd–11.2 wt % Lu alloy in the form of foil 50 μm thick, the specific hydrogen permeability of which is studied in the course of cyclic heating and cooling in a hydrogen atmosphere in a temperature range of 300–500ºС. The Pd–11.2 wt% Lu membrane is shown to demonstrate the high and stable hydrogen permeability. The evolution of the surface structure of the membrane during its operation in the hydrogen atmosphere is studied by atomic force microscopy using the phase contrast mode