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Keywords:

  • anodization;
  • H2 production;
  • heterogeneous catalysis;
  • nanocavities;
  • titanium dioxide
Thumbnail image of graphical abstract

Peas in a pod: A highly aligned Aunp@TiO2 photocatalyst was formed by self-organizing anodization of a Ti substrate followed by dewetting of a gold thin film. This leads to exactly one Au nanoparticle (np) per TiO2 nanocavity. Such arrays are highly efficient photocatalysts for hydrogen generation from ethanol.