The synthesis of colloidal nanocrystal (NC) catalysts has advanced dramatically with the reactivity of these “artificial atoms” precisely programmed by the control of NC size, shape, and surface treatments, and doping. This talk will share specific examples of how combinations of shape control and doping can provide basic insight into electrocatalytic and photocatalytic function. The design of core/shell architectures for electrocatalysis has emerged as one of the most promising design strategies in catalysis research to compliment shape control and crystal structure engineering. I will describe advances in combining selective shape synthesis with core/shell overcoating strategies to improve the performance and cost of electrocatalysts. Specific examples will be drawn from studies of CoP2/Pt core/shell nanorods (5), and Pt/Ni core/shell NCs and advances in intermetallic electrocatalysts will be shared. Shape engineered titanium and tungsten oxide systems will be explored to illustrate model reactions. I will highlight some of our efforts to advance the understanding of shape/facet dependent photocatalytic properties of TiO2. We will report on the facet dependent reactivity of anatase TiO2 NCs surface treated with fluorine to control the shape and in brookite TiO2 nanorods in which the average nanorod aspect ratio is adjusted to optimize the photocatalytic activity. Progress in the doping of the brookite nanorods will also be discussed as a method to extend their activity further into the visible and enhance photocatalytic activity.

Surface and shape engineering in monodisperse nanocrystal electrocatalysts and photocatalysts

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.