Multiple scattering approach to the Pt L2-edge XANES of CO adsorption on small Pt particles

Abstract A recent experimental result shows that Pt L-edge XANES spectra for Pt small cluster with ∼20 Pt atoms are sensitive to CO adsorption. In the present study we try to extract useful information about geometric and electronic structures of these cluster by applying a full multiple-scattering approach for the XANES analyses. Although IR analyses show that [CO] top /[CO] bridge is nearly constant for wide range of [CO] ad , it is difficult to estimate the ratio because of the large difference of the IR transition intensity for different adsorbed CO molecules. The present XANES analyses provide us useful new information [CO] top /[CO] bridge =1–2.