Abstract
The reaction of hydrogen and deuterium with palladium has been investigated using pressure-composition-temperature (PCT) measurements at very low hydrogen and deuterium concentrations in palladium powder having a surface area of 1.03 m2 g−1 to determine the nature of a surface “film” that affects the diffusional uptake of hydrogen by palladium. PCT isotherms measured on the palladium powder indicated the presence of a two-phase region having an equilibrium pressure of less than 0.5 Pa and a stoichiometry of approximately one monolayer at 299 K. At 421 K, the stoichiometry had decreased by half with a twofold increase in the equilibrium pressure. These isotherms are presented in terms of the experimental PCT curves and those calculated for the “surface hydride”. The equilibrium pressure for deuterium was lower than that for hydrogen for this “surface hydride”, having an Einstein temperature estimated to be 1600 K.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
