title: Effect of hydrogen adsorption on the x-ray absorption spectra of small Pt clusters.
abstract: Hydrogen adsorption on Pt(6)H(n) clusters leads to striking changes in the Pt L(2,3) x-ray absorption spectra. These effects are interpreted using a self-consistent real space Green's function approach. Calculations show that they are due largely to changes in the atomic background contribution to x-ray absorption (i.e., atomic x-ray absorption fine structure) and to reduced Pt-Pt scattering at the edge, while Pt-H multiple scattering is relatively weak. The origin of both effects is traced to the change in the local Pt potential due to Pt-H bonding.
authors: Department of Physics, University of Washington, Seattle 98195-1560, USA.
authors: A L
authors: AL
authors: Ankudinov
authors: J J
authors: JJ
authors: Rehr
authors: J
authors: J
authors: Low
authors: S R
authors: SR
authors: Bare