Affordable Access

Publisher Website

He-diffraction studies of hydrogen chemisorption on rhodium (311)

Authors
Journal
Surface Science
0039-6028
Publisher
Elsevier
Publication Date
Identifiers
DOI: 10.1016/0039-6028(95)00154-9
Keywords
  • Atom-Solid Scattering And Diffraction — Elastic
  • Chemisorption
  • Hydrogen
  • Rhodium
  • Stepped Single Crystal Surfaces

Abstract

Abstract The (311) surfaces of fcc materials are of special interest as they offer, due to the existence of (111) and (100) microfacets, a large variety of differently coordinated adsorption sites. He atom beam diffraction experiments were performed on Rh(311) in order to investigate the formation of ordered chemisorption structures of hydrogen. The observation of c(1 × 3), p(1 × 1) and p(1 × 1) REC phases is in agreement with previous LEED studies. However, before the formation of the c(1 × 3), a c(1 × 1) phase was identified with He diffraction, which requires a coverage of 1 ML. Therefore, the initial sticking coefficient of hydrogen is practically unity and the saturation H-coverage reached in the p(1 × 1) REC phase is 2–3 ML, much larger than anticipated.

There are no comments yet on this publication. Be the first to share your thoughts.