Nuclear magnetic resonance measurements of rotating-frame relaxation times were used to determine the H diffusion parameters for amorphous and crystalline samples of Zr2PdHx (table 198). Enhanced proton mobility was detected in the case of the glassy material. It was considered that both the host crystal structure and proton site occupancy made an appreciable contribution to the diffusion process. It was concluded that the smaller activation energies corresponded to jumps which involved octahedral sites.

R.C.Bowman, A.Attalla, A.J.Maeland, W.L.Johnson: Solid State Communications, 1983, 47[10], 779-82

Table 198

Activation Energies for H Diffusion in Zr2PdHx