“…Moreover, hydrogen is considered as a powerful alternative energy source and has been widely studied for many researchers throughout the years (5,6). Meanwhile, the hydrogen gas can not be detected by the human olfative system (from 4% to 75%) (7), and is highly inflamable making the development of sensors imperative, (8,9,10,11,12,13,14,15). This work is focused on the development of palladium-film catalysts deposited by e-beam evaporation technique and on the evaluation of their behavior in hydrogen sensing after annealing under air and forming gas expositions.…”