Size of cerium dioxide support nanocrystals dictates reactivity of highly dispersed palladium catalysts

Muravev, Valery; Parastaev, Alexander; Bosch, Yannis van den; Ligt, Bianca; Claes, Nathalie; Bals, Sara; Kosinov, Nikolay; Hensen, Emiel J. M.

doi:10.1126/science.adf9082

articleScienceJun 15, 2023GREEN OA

Size of cerium dioxide support nanocrystals dictates reactivity of highly dispersed palladium catalysts

VMValery Muravev APAlexander Parastaev YVYannis van den Bosch BLBianca Ligt NCNathalie Claes

Eindhoven University of Technology · University of Antwerp

PubMed

Indexed incrossrefpubmed

Abstract

The catalytic performance of heterogeneous catalysts can be tuned by modulation of the size and structure of supported transition metals, which are typically regarded as the active sites. In single-atom metal catalysts, the support itself can strongly affect the catalytic properties. Here, we demonstrate that the size of cerium dioxide (CeO 2 ) support governs the reactivity of atomically dispersed palladium (Pd) in carbon monoxide (CO) oxidation. Catalysts with small CeO 2 nanocrystals (~4 nanometers) exhibit unusually high activity in a CO-rich reaction feed, whereas catalysts with medium-size CeO 2 (~8 nanometers) are preferred for lean conditions. Detailed spectroscopic investigations reveal support…

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Topics & keywords

Topics

Keywords

Catalysis
Palladium
Cerium
Nanocrystal
Cerium oxide
Carbon monoxide
Reactivity (psychology)
Nanometre

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