Metals in cores

Fig. 11. The distribution of trace metals in cores from Long Island Sound, (a) Location map of cores described in this article, (b) Core 1148 data from Thomson et al., 1975. (c) Core NWC-102975 data from Benninger et al. (1979). (d) Core 1036 data from Turekian (1979).

In this chapter, we will focus on core-shell structures in which the core is a metal but the shell is ceria or some mixed oxide of ceria. For catalytic applications, the oxide shell should probably be considered at least somewhat porous, so that reactant molecules can access sites on the metal core however, there have been suggestions that the presence of a group VIII metal in core-shell particles or metal cations within the ceria can modify the properties of the ceria. More generally, there are two primary reasons to consider core-shell nanoparticles in which the shell is an oxide ... 

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