Alloying represents a common approach toward advanced catalysts beyond pure metals, in which heteroatomic interactions can induce geometric and/or electronic effects to modify the surface adsorption properties and reactivities. Conventional alloy catalysts however lack precise control over the local atomic structures of active sites. This presentation will discuss two examples of our recent progress on controlling the ensemble size of active sites in heterogeneous catalysts: i) Bimetallic Pd@Au electrocatalysts with tunable Pd ensemble size at the atomic scale for CO<sub>2</sub> reduction; ii) Atomically dispersed transition metal sites for thermocatalytic activation and conversion of methane into valuable (oxygenated) hydrocarbons. Our focus will be placed on fundamental undstanding of the structure-property relationships of the active site ensembles of various sizes, aiming at insights toward advanced catalyst design with control over the catalytically active sites at the atomic scale.

Ensemble effects of active sites in advanced (electro) catalysts for CO<sub>2</sub> reduction and methane conversion

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.

Ensemble effects of active sites in advanced (electro) catalysts for CO2 reduction and methane conversion

Ensemble effects of active sites in advanced (electro) catalysts for CO₂ reduction and methane conversion