(381e) Structure-Property Relationships That Influence Platinum Cluster Stability in All-Silica or Highly Siliceous Zeolites

In this study we demonstrate the necessity of alkali cations and siloxy/silanol nests in stabilizing platinum clusters on all-silica zeolites. Stable platinum particles are produced either by impregnating platinum onto an alkali-cation-containing all-silica MFI or by deboronating a borosilicate to create silanol nests and then co-impregnating with potassium and platinum sources. Platinum impregnation alone onto a deboronated or borosilicate MFI does not produce stable platinum clusters after reduction.