Fig. 11. (a–e) SEM images of TiO2 nanotube arrays: (a) sputter-coated with a 5 nm-thick Pt film and (b) after thermal dewetting in N2 (600 °C); (c–e) sputter-coated with different Pt amounts ((c) 2, (d) 7, and (e) 10 nm) and then dewetted in N2. Insets in (a) and (b): top view SEM images. (f) Photocatalytic H2 generation rate (r H2) of various Pt/TiO2 nanocavity arrays decorated by sputtering–dewetting of different Pt loadings. Fig. (a–f) are reprinted (adapted) with permission from ref. 139. Copyright 2016 American Chemical Society.
