Rhodium (Rh) is a critical component of many catalysts for a variety of chemical transformation processes. Controlling the shape of Rh nanocrystals offers an effective route to the optimization of their catalytic performance owing to a close correlation between the catalytic activity/selectivity and the surface atomic structure. It also helps to substantially reduce the loading amount and thus achieve a sustainable use of this scarce and precious metal. In this talk, I will focus on recent progress in the shape-controlled synthesis of Rh nanocrystals with a goal to enhance their catalytic/electrocatalytic properties. Both traditional and newly-developed synthetic strategies and growth mechanisms will be discussed, including those based on the use of surface capping agents, manipulation of reduction kinetics, control of surface diffusion rate, management of oxidation etching, and electrochemical alteration. I will also use several examples to highlight the unique opportunities offered by shape-controlled synthesis for enhancing the use of this metal in catalytic applications.

Shape-controlled synthesis of rhodium nanocrystals for catalytic/electrocatalytic applications

ACS Fall 2021

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