Open AccessHydrogen permeability and catalytic characteristics of a palladium-silver membrane with a modified surface
Author(s) -
И. С. Петриев
Publication year - 2021
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1758/1/012029
Subject(s) - palladium , hydrogen , materials science , electrolyte , chemisorption , electrochemistry , catalysis , chemical engineering , permeability (electromagnetism) , membrane , sputter deposition , activation energy , sputtering , thin film , inorganic chemistry , analytical chemistry (journal) , electrode , chemistry , nanotechnology , chromatography , biochemistry , organic chemistry , engineering
Thin films of Pd-23% Ag modified with nanostructured highly dispersed palladium by the method of electrolytic deposition have been obtained by magnetron sputtering. Electrochemical studies have demonstrated that the modified Pd-23% Ag film shows a high peak current (up to 2.15 µA cm −2 ) and excellent electrocatalytic activity in relation to the methanol oxidation reaction. The stability of the developed modified film is confirmed by the results of multi-scanning. Comparison of the hydrogen permeability has been demonstrated a significant increase in the hydrogen permeability of the modified membrane compared to the smooth one at an overpressure of 0.3 MPa. According to the approximation of the results obtained by a first-order line and calculations of the activation energy, which was 30.6 kJ mol −1 , it can be concluded that the transport of hydrogen is limited by surface effects, namely chemisorption.