Special Inorganic Chemistry Seminar: Surface and Interface Control of Metal Nanocrystals for Catalysis and Bioapplications

Seminar series
Inorganic Chemistry
When
Mon, Jul 22 4:00pm
Where
Cram Conference Room, 3440 Mol Sci
Speaker Professor Nanfeng Zheng
Xiamen University
Department of Chemistry
Description

Much of our research effort has been directed towards the development of effective methods to control the surface, interfacial and also hierarchical structures of inorganic nanomaterials. In this talk, I will provide an overview of our recent research in the surface and interfacial structure control of metal nanocrystals. I will first discuss how small adsorbates can be used to control the surface structure of Pd/Pt nanocrystals. For example, halides strongly adsorb on Pd {100} and thus promote the selective production of Pd nanocubes and Pd nanowires with {100}r exposed facets. CO molecules behave differently in the controlled synthesis of Pd and Pt nanostructures. CO prefers to adsorb on Pd {111} surface to facilitate the growth of ultrathin Pd nanosheets and tetrapod/tetrahedral nanocrystals having {111} as the main exposure surface. But for Pt, the preferential adsorption of CO on Pt {100} induces the formation of Pt nanocubes. The strong adsorption of amines on Pt stepped sites help the formation of high-index {411} faceted Pt nanocrystals displaying an excellent electrocatalytic activity. Besides the surface structure control and their applications of the shape-controlled metal nanocrystals, the control over the interfacial structure of metal nanocrystals for the optimization of their catalysis and bio-properties will be presented in the talk.

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