Figure 21.

Top and cross‐sectional SEM images of pure TNAs (a,b) and Pd QDs/TNAs (c,d). The insets show the corresponding magnified images. TEM (e) and HRTEM (f) images of TNAs coated with Pd QDs. Amount of hydrogen generated by capitalizing on TiO₂ nanotubes and Pd/TNTAs nanocomposites as photoanodes and Pt foil and Pd/TNTA nanocomposites as cathodes at –0.3 V_SCE in a PEC cell containing a 2 M Na₂CO₃ and 0.5 M ethylene glycol solution under 320 mW cm^–2 irradiation (g). Schematic of Pd/TNAs on photoelectrolytic water splitting for hydrogen production (h). Schematic illustration of TNAs deposited with Pd QDs and the charge transfer process from TiO₂ to Pd (i). Reproduced with permission.135 Copyright 2012, American Chemical Society.