An electrolytic double-cell system was used to monitor variations in the diffusivity of H through membranes, at temperatures of between 280 and 333K, for Ag contents ranging from 0 to 30at% (table 134). The experimentally determined diffusivities were analyzed in terms of the cell theory of interstitial solid solutions. At a given temperature, the H diffusivity exhibited an initial small increase with increasing Ag concentration. This was attributed to lattice dilation effects. As the Ag concentration increased beyond 0.05at%, the H diffusivity decreased due to the generation of trapping sites for H atoms.

The Diffusivity of Hydrogen in Pd-Ag-H Ternary Solid Solutions. T.Ishikawa, R.B.McLellan: Acta Metallurgica, 1986, 34[9], 1825-32