Optimizing the Pt‐FeOx Interaction over Atomic Pt/FeOx/CeO2 Catalysts for Improved CO Oxidation Activity. Issue 1 (1st December 2022) - Wang, Bao‐Ju
Abstract: The metal‐supported CeO2 catalysts (such as Pt/CeO2 ) have been considered as the most promising exhaust‐treatment catalyst to meet the future emission standard. However, the Pt‐O‐Ce interface on Pt/CeO2 system seems to over‐stabilize the Pt sites to cause low activity for CO oxidation. In this work, by adding Fe oxides, the enhanced Pt‐FeOx interaction was formed with the disappearance of the Pt‐O‐Ce interface, facilitating the electron transfer from the support to the atomically dispersed Pt on the Pt‐FeOx interface for the dramatically CO (preferential) oxidation performance. The single‐atom Pt/1.5FeOx /CeO2 performed the best catalytic activity with a reaction rate of 0.58 s −1 at 144 °C ( T 100 ). Such strategy in resorting the special metal‐support interaction to tune the active sites can be extended to other metal‐oxide systems for further optimized catalysis. Abstract : Metal‐supported CeO2 catalysts (e.g. Pt/CeO2 ) are considered most promising for exhaust treatment to meet the future emission standards. Here, by adding Fe oxides, enhanced Pt‐FeOx interaction was formed with the disappearance of the Pt‐O‐Ce interface over Pt/1.5FeOx /CeO2, contributing to a dramatically improved CO oxidation performance.