180.    BEECK, O., GIVENS, J. W., AND RITCHIE, A. W.  Adsorption of Hydrogen on Nickel Catalysts.  II.  Sorption Isobars From 20° K. to Room Temperature.  Jour. Colloid Sci., vol. 5, 1950, pp. 141-147; Chem. Abs., vol. 44, 1950, p. 6228.

                  Sorption isobars were determined for H₂ at 0.1 mm. Hg pressure on evaporated Ni films, over the temperature range –253°-25°.  Slow activated sorption, interpreted as absorption of H₂ into the interior of the metal structure, was observed in agreement with previous results.  The process is exothermic and, after initiation by raising the temperature to approximately –150°, will continue at much lower temperatures.