Multi-metal nanostructures of specific compositions and enclosed by certain facets can significantly enhance their catalytic reactivity and selectivity for chemical reactions associated with energy conversions, including transformation of chemical and solar energy to electricity. In this presentation, a seeded growth of copper-platinum-ruthenium multi-metal nanostructures will be presented involving the use of copper nanoparticles as seeds. By tuning the reaction rate, the deposition of the second metals, those are platinum and ruthenium, could site-selectively occur on specific facets of the seeds.  The electrocatalytic activity of these multi-metal nanostructures are evaluated for methanol electro-oxidation and compared with the standard platinum-ruthenium catalyst. Additionally, a comparison study of structure and composition effects on the electrocatalytic activities, as well as the electronic coupling effects on the oxidation states of the different components in these nanostructures, will be discussed to provide some guideline for rational design of next-generation electrocatalysts.

Seeded growth of copper-platinum-ruthenium multi-metal nanostructures as active electrocatalysts

254th National Meeting (2017)

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