Synthesis and Gas-Transport Parameters of Membranes Modified by Star-Shaped Palladium Nanocrystallites

Abstract

Methods for modifying the surface of Pd–23%Ag alloy films and synthesizing nanostar- and nanopore-type palladium coatings, which enhance the hydrogen transport rate, were developed. The gas-transport parameters of membranes with their surfaces activated this way were examined. Pd–Ag films with surfaces modified by star-shaped palladium nanocrystallites demonstrate hydrogen flow densities as high as 0.75 mmol/(s m²) under low temperatures (<100°С) and pressures (<0.6 MPa) if the palladium membranes are sufficiently thin (<10 μm). The flow density provided by nanopore-type coatings is 1.7 times lower.