Abstract
The interaction of gaseous hydrogen with clean and oxidized polycrystalline magnesium surfaces has been studied by time-of-flight (TOF) analysis of directly recoiled surface atoms (neutrals plus ions) produced by pulsed Ar + ion irradiation. The spectra exhibit no surface hydrogen for H 2 exposures up to 2000 L on clean magnesium, indicating that either hydrogen does not react at all or it reacts to yield a totally subsurface hydrogen product. Oxidized magnesium reacts with H 2 to yield a product with a surface stoichiometry of approximately one hydrogen to one MgO pair. The H 2/MgO reaction kinetics fit a one-site adsorption model with H 2 sticking probability of 8 × 10 −4. The direct recoil technique is sensitive to the structural change resulting from the reaction of hydrogen with MgO.
Sign-in/Register to access full text options 
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.
