Hydrogen on rhodium (110); the formation of a high-density chemisorbed phase

Abstract

The adsorption of H (D) on Rh (110) at 80 K leads to a sequence of lattice gas phases: p1 × 3 at θ = 1 3 , p1 × 2 at θ = 1 2 , 1 × 3-2H at θ = 2 3 and 1 × 2-3H at θ= 3 2 ; and also the formation of a 1 × 1 -2H phase at θ = 2, the first time that a chemisorbed H layer with a density nearly 2 × 10 15 atoms/cm 2 is reported for a fcc surface. LEED investigations suggest the absence of surface reconstruction due to adsorbed hydrogen.