Micro-electrochemical studies were made of H storage materials by using a micro-electrode technique. A C-fibre filament was placed in contact with single particles of the alloys, in 1M KOH solution, by using a micromanipulator. In this way, cyclic voltammetric, potential step experiments and  in situ  X-ray diffraction experiments could be carried out. The current responses were recorded as a function of time were analyzed by using a spherical diffusion model. The room-temperature diffusivity was 6.2 x 10-9 cm2/s.

T.Nishina, H.Ura, I.Uchida: Journal of the Electrochemical Society, 1997, 144[4], 1273-8

Table 180

Grain-Boundary Diffusivity of 51Cr in Ni-15.18Cr-7.76Fe-0.07wt%C