Seed-mediated co-reduction is a versatile synthetic route to strain-engineered core@shell electrocatalysts with alloyed surfaces. This presentation will highlight the generality of this synthetic approach by showing that Pt-M alloyed surfaces can be deposited on seeds, with the Pt-M identity, Pt-to-M ratio, and overall shell thickness being precisely tuned. These synthetic levers, in turn, allow for catalyst activity to be optimized. Moreover, by comparing allowed surfaces deposited on random alloy and intermetallic seeds of the same composition, we show that the crystallinity of the core impacts catalyst durability to provide sustained performance and minimal leaching of the non-noble metals from the catalyst surface. This enhanced durability is shown with several catalysts and is likely a general feature enabled through the use of intermetallic cores.

Designing highly durable core@shell electrocatalysts

2019 Fall National Meeting

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