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What Changes on the Inverse Catalyst? Insight From CO Oxidation on Au-Supported Ceria Nanoparticles Using Ab Initio Molecular Dynamics

preprint
submitted on 17.12.2019, 21:44 and posted on 23.12.2019, 06:11 by Yong Li, Shikun Li, Marcus Bäumer, Lyudmila V. Moskaleva
Oxidation reactions catalyzed by Au nanoparticles supported on reducible oxides have been widely studied both experimentally and theoretically, whereas inverse catalysts, in which oxide nanoparticles are supported on metal surfaces, received considerably less attention. In both systems catalytic activity at metal – oxide interfaces can arise not only from each material contributing its functionality, but also from their interactions creating properties beyond the sum of individual components. Inverse catalysts may retain the synergy between the metal and oxide functionalities, while offering further specific advantages, e.g. a possibility to have better control over interfacial sites or to yield improved stability, activity, and selectivity. Our work provides the mechanism of O atom/vacancy diffusion-assisted Mars-van-Krevelen CO oxidation on gold-supported ceria nanoparticle through state-of-the-art ab initio molecular dynamic simulation studies.

Funding

German Research Foundation (DFG) Project No. MO 1863/3-1

History

Email Address of Submitting Author

liyong@uni-bremen.de

Institution

University of Bremen

Country

Germany

ORCID For Submitting Author

0000-0002-2774-841X

Declaration of Conflict of Interest

No conflict of Interest

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