The behavior of D and H in single crystals of 4N-purity material was investigated by using a time-lag technique and a pressure difference of 500torr. The H diffusion results, at 600 to 900K, could be described by:

D (cm2/s) = 6.0 x 10-3 exp[-5.9(kcal/g-atom)/RT]

and the H permeation results, at 550 to 900K, could be described by:

P (g-atom/cm s) = 7.6 x 10-7 exp[-16.9(kcal/g-atom)/RT]

The ratio, DH/DD, was equal to 1.16

Solubility and Diffusion of Hydrogen and Deuterium in Platinum. Y.Ebisuzaki, W.J.Kass, M.O’Keeffe: Journal of Chemical Physics, 1968, 49[8], 3329-32

 

Table 157

Diffusion of H in Pt

 

Temperature (C)

D (m2/s)

558

1.26 x 10-8

606

1.50 x 10-8

666

1.92 x 10-8

726

2.45 x 10-8

748

2.33 x 10-8

751

3.25 x 10-8

772

2.80 x 10-8

797

3.40 x 10-8

804

2.93 x 10-8

831

3.12 x 10-8

885

3.66 x 10-8

896

4.20 x 10-8

936

4.05 x 10-8

872

3.63 x 10-8

767

2.80 x 10-8

754

3.30 x 10-8

735

2.75 x 10-8

713

2.45 x 10-8

679

2.32 x 10-8

630

1.93 x 10-8