Open AccessHydrogen permeability of surface-modified Pd-Ag membranes at low temperatures
Author(s) -
И. С. Петриев,
I. S. Lutsenko,
К. А. Воронин,
Polina Pushankina,
М. Г. Барышев
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/791/1/012058
Subject(s) - membrane , palladium , hydrogen , materials science , coating , chemical engineering , chemisorption , metal , dissociation (chemistry) , inorganic chemistry , catalysis , chemistry , composite material , metallurgy , organic chemistry , biochemistry , engineering
Hydrogen-permeable membranes of the Pd77% Ag33% alloy were obtained. Membranes were modified with a catalytically active coating, which consist of a crystalline nanostructured palladium black. Membranes were obtained by magnetron sputtering using mosaic targets. The surface modification with a catalytically active coating was performed by electrochemical deposition from an aqueous solution of H 2 PdCl 4 . The low-temperature kinetic characteristics of the hydrogen permeability of metallic Pd77% Ag23% membranes with a modifying coating of crystallized palladium black were analysed. During the analysis of the obtained experimental data about the kinetic characteristics of the obtained membranes, it was revealed that the surface effects are the limiting stage of hydrogen transport through palladium membranes at low temperatures. It was experimentally confirmed that the high specific surface of the synthesized catalysts causes the acceleration of the kinetic characteristics of hydrogen transport. The possibility of intensifying the processes of hydrogen transport through metallic membranes by creating active centers of chemisorption and dissociation on their surface is shown.