Shape-controlled metal nanoparticles (NPs) interfacing Pt and non-precious metals (M) are highly active energy conversion electrocatalysts; however, there are still few routes to shaped M-Pt core-shell or double-shelled NPs and fewer studies on the geometric effects of shape and strain on catalysis by such structures.  Here, shape-controlled multilayered NPs are synthesized by an aqueous, low temperature approach.  The combination of mild conditions and shaped substrates directs the overgrowth in an oriented, layer-by-layer fashion.  Exposing a majority of 100 facets, the catalytic performance in formic acid and methanol electro-oxidations is assessed.  The strain imparted to the Pt shell results in higher specific initial activities.

Shaped core-sandwich-shell nanoparticles: Synthesis and influence of sandwich layers on electrooxidation

248th National Meeting (2014)

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