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HAADF-STEM images of Au catalysts samples after reduction at 200 °C for 2 h in flowing hydrogen supported by (a) MCM-41, (b) SBA-15 with 4.8 nm thick pore walls, (c) SBA-15 with 2.6 nm-thick pore walls, (d) HMM-2, (e) SBA-12, and (f) SBA-11. Reproduced with permission from ref (75). Copyright 2005 American Chemical Society.
