CuO-CeO2-based catalysts have been extensively investigated for a variety of heterogeneous reactions. Interaction between Cu and Ce species within the oxygen-constructed framework leads to tunable redox properties on the CuO-CeO2 surface, while elucidating the active sites in CuO-CeO2 catalysts remains challenging, mainly due to the complicated structures involving different CuO-CeO2 domains that can hardly be differentiated. While both doping and interfacial engineering have been proposed to yield improved catalytic performance compared with individual component, a comprehensive comparison based on morphology-equivalent catalysts is desired. We have been focusing on developing diverse synthetic and post-synthetic approaches to access well-defined and composition-tunable CuO-CeO2 nanostructures. Through applying a suite of spectroscopic and catalytic techniques, we have been able to compare the mechanisms of CO oxidation for doping and interface engineering, as well as their pros and cons in practical applications. Utilizing novel synthetic tools to access well-defined nanostructures provides capabilities to decouple doping and interface engineering effects that are commonly employed for heterogeneous catalysts, and elucidate structure-property relationships that underpin diverse functionalities.

Exploiting active sites of nanostructured CuO-CeO2 catalysts for CO oxidation

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.