Ankudinov A L, Rehr J J, Low J, Bare S R
Department of Physics, University of Washington, Seattle 98195-1560, USA.
Phys Rev Lett. 2001 Feb 19;86(8):1642-5. doi: 10.1103/PhysRevLett.86.1642.
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.
氢在Pt(6)H(n)团簇上的吸附导致Pt L(2,3) X射线吸收光谱发生显著变化。使用自洽实空间格林函数方法对这些效应进行了解释。计算表明，它们主要是由于原子背景对X射线吸收的贡献变化（即原子X射线吸收精细结构）以及边缘处Pt-Pt散射的减少，而Pt-H多重散射相对较弱。这两种效应的起源都可追溯到由于Pt-H键合导致的局部Pt势的变化。
