The diffusivity of H in Pd-based solid solutions (table 152) was measured at temperatures of between 280 and 360K by using electrochemical techniques. The results indicated that the addition of either of the substitutional solutes to the Pd lattice decreased the H diffusivity. The data were explained in terms of the cell model for solid solutions. In the case of the Pd-Pt system, the kinetic data agreed with the predictions of the cell model.

The Diffusivity of Hydrogen through Pd-Based Solid Solutions Containing Rhodium and Platinum. M.Yoshihara, R.B.McLellan: Acta Metallurgica, 1986, 34[7], 1359-66

Figure 32

Diffusivity of D and H in Pd70Ni10Si20

(open squares: H in crystalline material, filled squares: D in crystalline material,

open circles: H in amorphous material, filled circles: D in amorphous material)