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NIR spectra after activation at 873 K of (A) P25 in contact with H2O at 15 mbar (curve a) and progressive decreasing of the water coverage till outgassing H2O for 15 min at room temperature (curve s). (B) H2O adsorbed at 15 mbar on SX001 (light blue), P25 (dark grey) and PC105 (orange). (C) outgassing H2O for 15 min at room temperature for on SX001 (light blue), P25 (dark grey) and PC105 (orange). In part (B) and (C) the spectra have been normalized to the most intense peak.
