Figure 3.

Fourier transform and EXAFS signals χ(k) at the L ₃-edge of Pt in (a, b) impregnated and (c, d) one-pot 2.5 wt% Pt/CeO₂ catalysts during in situ reduction and CO oxidation at three different temperatures (323, 373 and 423 K). Fourier transformation of the k ³-weighted EXAFS function k ³χ(k) into R space using a Kaiser–Bessel window function was performed in the range 2–10 Å⁻¹, yielding the function |χ(R)| (Å⁻⁴).