The diffusivity of H on the surface was determined by performing steady-state flux measurements on a porous disk of spectroscopically pure material. The diffusivity at 37C was equal to 3 x 10-8cm2/s. This value agreed well with previous field emission microscopy data.

C.N.Satterfield, H.Iino: Ind. Eng. Chem. Fundam., 1968, 7[2], 214-8