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Keywords:

  • heterogeneous catalysis;
  • cerium;
  • EXAFS spectroscopy;
  • gold;
  • nanostructures
Thumbnail image of graphical abstract

Beneficial defects: Reactive η1-superoxide and peroxide species at one-electron defect sites are formed at the metal–support interface in gold nanoclusters on nanocrystalline CeO2−x. These intermediates oxidize CO adsorbed on gold to form CO2. The reactive oxygen species are formed on nanocrystalline CeO2−x (see picture) but not on conventional CeO2, and their formation is enhanced by the gold.