Hydrogen absorption of LaNi5 powders precovered with O2, CO, H2S, CO2 or N2

Abstract LaNi 5 powder samples were first exposed to contamination gases such as O 2 , CO, H 2 S, CO 2 or N 2 and then loaded with pure hydrogen gas. The coverage needed for poisoning was measured and the absorption kinetics of poisoned and unpoisoned samples is described.