Activation of surface lattice oxygen in single-atom Pt/CeO2 for low-temperature CO oxidation

In this study, we demonstrate how atomically dispersed ionic platinum (Pt2+) on ceria (CeO2), which is already thermally stable, can be activated via steam treatment (at 750°C) to simultaneously achieve the goals of low-temperature carbon monoxide (CO) oxidation activity while providing outstanding hydrothermal stability. A new type of active site is created on CeO2 in the vicinity of Pt2+, which provides the improved reactivity. These active sites are stable up to 800°C in oxidizing environments.

Source: ScienceNOW - December 14, 2017 Category: Science Authors: Nie, L., Mei, D., Xiong, H., Peng, B., Ren, Z., Hernandez, X. I. P., DeLaRiva, A., Wang, M., Engelhard, M. H., Kovarik, L., Datye, A. K., Wang, Y. Tags: Chemistry, Engineering reports Source Type: news