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Figure 4
(a) Photoemission spectra of the Pt 4f line taken with 220 eV photons at 3 mbar of water vapour and 0°C. The spectra have been shifted with a fixed offset along the intensity axis for clarity. (b) Evolution of the areas of the Pt 4f7/2 peaks as a function of the sequentially acquired spectra: full blue square, red circle, olive triangle and green diamonds represent metallic Pt, Pt-Oads/OH, PtO and PtO2, respectively. The grey lines are guides for the eye.

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ISSN: 1600-5775
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