A feasibility study of “range-extended” EXAFS measurement at the Pt L3-edge of Pt/Al2O3 in the presence of Au2O3.

A feasibility study of a “range-extended” EXAFS measurement was conducted on the Pt L₃-edge of Pt/Al₂O₃ in the presence of Au₂O₃. The Pt L₃-edge EXAFS spectrum of the Pt/Al₂O₃ sample was successfully obtained without any interference at the Au L₃-edge by means of high energy resolution fluorescence detection (HERFD) of the Pt Lα₁ line with a Bragg type X-ray emission analyser crystal. A newly observed significant enhancement of the EXAFS oscillation amplitude was discussed on the points of the core-hole lifetime width and X-ray energy width. We also successfully obtained reasonable physical parameters by a conventional EXAFS curve fitting on the HERFD-EXAFS data. The HERFD-EXAFS technique can broaden the scope of application of EXAFS spectroscopy for complicated samples with many different elements. [ABSTRACT FROM AUTHOR]