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.
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