Atomic level fluxional behavior and activity of CeO₂-supported Pt catalysts for CO oxidation.

ABSTRACT: Reducible oxides are widely used catalyst supports that can increase oxidation reaction rates by transferring lattice oxygen at the metal-support interface. There are many outstanding questions regarding the atomic-scale dynamic meta-stability (i.e., fluxional behavior) of the interface during catalysis. Here, we employ aberration-corrected operando electron microscopy to visualize the structural dynamics occurring at and near Pt/CeO₂ interfaces during CO oxidation. We show that the catalytic turnover frequency correlates with fluxional behavior that (a) destabilizes the supported Pt particle, (b) marks an enhanced rate of oxygen vacancy creation and annihilation, and (c) leads to increased strain and reduction in the CeO₂ support surface. Overall, the results implica

SUBMITTER: Vincent JL 

PROVIDER: S-EPMC8490411 | biostudies-literature | 2021 Oct

REPOSITORIES: biostudies-literature