Article ID Journal Published Year Pages File Type
1674277 Thin Solid Films 2008 8 Pages PDF
Abstract

Hydrogen permeation performance of three thin palladium–copper composite membranes with different thicknesses had been studied between 398 K and 753 K. Hydrogen permeance was obtained up to 2.7 × 10− 6 mol/(m2 s Pa) with an ideal selectivity over 1000 at 753 K. The hydrogen permeation exhibited two different activation energies over the temperature range: lower activation energy of about 9.8 kJ/mol above 548 K, while higher activation energy of about 26.4 kJ/mol below 548 K. After permeation tests, the alloy membranes were characterized by X-ray photoelectron spectroscopy, scanning electron microscopy, energy dispersive X-ray analysis and in situ X-ray diffraction. Palladium segregation on the surface of these palladium–copper alloys may induce changes of hydrogen permeation performance and thus influence the activation energies.

Related Topics
Physical Sciences and Engineering Materials Science Nanotechnology
Authors
, , , , , ,