Ceria has been used in alkene hydrogenation mainly as a support and often as a promoter or a stabilizer. Recently, it has been studied that CeO2 itself exhibits outstanding catalytic performance for selective hydrogenation of propylene and acetylene. However, the reaction mechanism beyond its superior reactivity still remains unclear. In this study, we report surface cerium hydride is active for selective hydrogenation of acetylene via in situ Inelastic neutron scattering spectroscopy (INS). The consumption of surface hydride and ethylene formation during the acetylene hydrogenation were confirmed through INS in situ diffuse reflectance infrared Fourier transformed spectroscopy (DRIFT). The finding of this work gives further insight into understanding the mechanism of acetylene selective hydrogenation over CeO2.

In situ inelastic neutron scattering study of selective alkyne hydrogenation over cerium oxide catalyst

2019 Fall National Meeting

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.