The diffusivity of H in Pd films at 278 to 323K was determined by using an electrochemical stripping method. It was found that the results which were obtained for films that were 0.00068 and 0.00136mm in thickness were some 2 orders of magnitude lower than published data for bulk material. The results were described by:

D (cm2/s) = 4.16 x 10-5 exp[-6.1(kcal/mol)/RT]

H.Hagi: Materials Transactions, 1990, 31[11], 954-8