The strength of metal-support interactions may be used to selectively produce metal nanoparticles on a reducible oxide in presence of weakly interacting supports. Such selectivity may be used to design hierarchical catalytic systems that display complex behaviors. This presentation will discuss the design and synthesis of a ternary system assembled from Pd, ceria and mesoporous silica, along with its characterization. Characterization of the system is complicated by the high dispersion and small Pd crystallite size typical of strongly interacting metal-support pairs, low Z-contrast between Pd and reducible ceria, and geometrical constraints imposed by the structure of the non-reducible silica. We will discuss the use of spectroscopic, microscopic and chemisorption tools to characterize the distribution of species in these hybrid materials, and examine the effects of such distribution on reactivity patterns of catalytic redox conversions.

Hierarchical catalyst design based on metal-support interactions

254th National Meeting (2017)

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