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XANES spectra recorded at the Au LIII edge of Au/CeO2 catalysts during CO oxidation in 1 % CO, 1 % O2, balance N2 at 80 °C: Top part: after a first O400 pretreatment and (middle) after a second O400 pretreatments (recalcination). Spectra (in black, dotted) refer to metallic Au (Au foil, bottom) and the fresh catalyst (top). Insets: White line intensities (dark blue) and reaction rate (red) for the first O400 (top, left) and the second treatment (bottom, right).
