Effect of the penetration of Li atoms into the Pd surface on thermodynamicproperties of the Pd-H system

This study reports the effect of the penetration of Li atoms into the Pd su rface on the pressure-composition-temperature relation of the Pd-H system a nd on the heats of reactions of hydrogen. A heat treatment of Pd in a 1 M L iOH solution induces the penetration of Li atoms into Pd even at 353 K. The marked enhancement about by 90-100% for the formation of hydrogen solid so lution, and about by 29% for the formation of PdH1-x hydride phase seems to be attributed to strong interactions of hydrogen with the Li atoms penetra ted from the LiOH during the pretreatment. (C) 1999 Elsevier Science S.A. A ll rights reserved.