Why Hydrogen Dissociation Catalysts do not Work for Hydrogenation of Magnesium.

ABSTRACT: Provision of atomic hydrogen by hydrogen dissociation catalysts only moderately accelerates the hydrogenation rate of magnesium. They shed light on this well-known but technically challenging fact through a combined approach using an unconventional surface science technique together with Density Functional Theory (DFT) calculations. The calculations demonstrate the drastic electronic structure changes during transformation of Mg to MgH₂ , which make fractional hydrogen coverage on the surface, as well as substoichiometric hydrogen content in the bulk energetically unfavorable. Reflecting Electron Energy Loss Spectroscopy (REELS) is used to measure the surface and bulk plasmon during hydrogen sorption in magnesium. The measurements show that the hydrogenation proceeds via the gro

SUBMITTER: Kazaz S 

PROVIDER: S-EPMC10870026 | biostudies-literature | 2024 Feb

REPOSITORIES: biostudies-literature