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1537. ---------------. [IIZIMA, S.] [Sorption of Hydrogen by Reduced Nickel. IV. The Velocity of Sorption of Hydrogen at the Early Stage.] Sci. Papers Inst. Phys. Chem. Research (Tokyo), vol. 26, 1935, pp. 45-69; Chem. Abs., vol. 29, 1935, p. 3893.
Rate of sorption of H2 by reduced Ni was measured at 0°, 10°, 21°, 30°, 40°, 50°, 60°, 70° and 100° for various pressures of H2. Except for the first 15 sec. after the introduction of H2 rate of sorption was followed up to 90 min. The results indicate 3 types of sorption. A rapid adsorption of the van der Waals type occurred during the 1st minute or 2. This was followed by a period of activated adsorption. Slow diffusion then followed and this was attributed to the diffusion of H from the surface to the interior of the metal as well as the slow distribution of H over the surface of the metal.