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1 Polish Journal of Chemistry

1 2001

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Diffusion Coefficients of Deuterium in Paladium Deuteride during Ab- and Desorption in High Pressures of Gaseous Deuteruim at 298 K

Baranowski B., Filipek S. M.

Polish Journal of Chemistry

2001

Vol. 75, nr 7

1051-1058

Exerting pressure jumps of several kbar in gaseous deuterium in the range of 5-28 kbar, surrounding a palladium deuteride wire, the diffusion coefficients of deuterium in the solid phase were evaluated by following the time course of the electrical resistance. Absorption of deuterium is characterized by a smaller diffusion coefficient than its desorption. Both represent a decreasing function with the inrease of deuterium pressure. The difference of the ab- and desorption kinetics is explained by the influence of the elastic energy on the energetics of the occupation of metallic interstitials by deuterium particles. Comparisons with previous measurements are given.