Structure of the monoclinic Al sub(13)Fe sub(4) (010) complex metallic alloy surface determined by low-energy electron diffraction

Complex metallic alloys having isolated transition-metal elements in the surface layer have been reported to work well as selective hydrogenation catalysts. We report an experimental determination of the surface structure of one such compound Al sub(13)Fe sub(4) (010). The structure was determined u...

Full description

Saved in:
Bibliographic Details
Published in:Physical review. B, Condensed matter and materials physics Condensed matter and materials physics, 2015-07, Vol.92 (1)
Main Authors: Matilainen, A, Pussi, K, Diehl, R D, Hahne, M, Gille, P, Gaudry, E, Loli, L N Serkovic, McGuirk, G M, de Weerd, M-C, Fournee, V, Ledieu, J
Format: Article
Language:English
Subjects:
Aluminum
Atomic structure
Compressed
Condensed matter
Hydrogenation
Interlayers
Iron
Low energy electron diffraction
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Complex metallic alloys having isolated transition-metal elements in the surface layer have been reported to work well as selective hydrogenation catalysts. We report an experimental determination of the surface structure of one such compound Al sub(13)Fe sub(4) (010). The structure was determined using low-energy electron diffraction. The best-fit structure terminates in a layer similar to the puckered bulk layer but lacking some of the Al and Fe atoms. Protruding Fe atoms are located in the middle of adjacent pentagonal Al formations, connected to each other by Al "glue" atoms. The top interlayer spacing is compressed relative to the bulk with oscillating relaxations observed for subsequent layers at the surface.
ISSN:1098-0121
1550-235X