, Volume 40, Issue 3-4, pp 175-181

Structural analysis of Au/Mg(OH)2 during deactivation by Debye function analysis

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Abstract

Using a Debye function analysis, the presence of icosahedral and face centered cuboctahedral gold in a 1 ∶ 1 ratio has been found in freshly prepared Au/Mg(OH)2 catalyst. The results support earlier studies which suggest the icosahedral form to be more stable at small nanometer sizes. Interactions between the gold and the Mg(OH)2 support appear to be weak, with the gold rapidly coagulating over a period of three months. Re-analysis of the aged sample shows the gold to be mainly in the form of truncated decahedra.