EPR identification of catalytically active oxygen species in ong class="boldFont">xong>Au/CeO₂.

The adsorption of air on ong class="boldFont">xong>Au/CeO₂ leads to the formation of two differente090f2f8a91db56482292e77acc5a">ontainer hidden">$O_2^{-}$ species.

The amount of strongly attached e090f2f8a91db56482292e77acc5a">ontainer hidden">$O_2^{-}$ and Au particles is responsible of catalytic activity.

The weakly adsorbed e090f2f8a91db56482292e77acc5a">ontainer hidden">$O_2^{-}$ forms when Cl⁻ ions are present in the solid.

The weakly adsorbed e090f2f8a91db56482292e77acc5a">ontainer hidden">$O_2^{-}$ is not catalytically active.