“…While the morphology, electron structure and catalytic activity of the Au/FeO x /SiO 2 /Si(100) model (AuPLD), and the coprecipitated Au/Fe 2 O 3 (AuCP) samples in response to the oxygen and the subsequent hydrogen treatments are similar [15] it is reversed for the Au-Fe/HY (AuHY) sample. The difference cannot be ascribed to the change in particle size because the average diameter of gold particles is always in the range 4-6 nm, and is only slightly modified by oxygen/hydrogen treatments.…”