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. 2020 Mar 30;120(8):3890–3938. doi: 10.1021/acs.chemrev.9b00662

Figure 2.

Figure 2

High angle annular dark field images of the leached catalyst showing changes as a result of in situ heating. Very little change was seen with time at 250 °C. (a) Starting image recorded after a few minutes at temperature. Only slight changes were seen after 2 min at 500 °C (b), but an additional 5 min at 500 °C showed void shrinkage, coalescence and growth of Au NPs, and the diffusion of Au species to the surface to form discrete nanocrystals (arrowed). Reproduced with permission from ref (66). Copyright 2009 Oxford Academic.