In Situ Investigation of Methane Dry Reforming on Metal/Ceria(111) Surfaces: Metal–Support Interactions and C−H Bond Activation at Low Temperature

• DOI: 10.1002/anie.201707538
• Publication Date: 2017-08-17T07:19:15Z
• Authors: Zongyuan Liu; Pablo Lustemberg; Ramón A. Gutiérrez; John J. Carey; Robert M. Palomino; Mykhailo Vorokhta; David C. Grinter; Pedro J. Ramírez; Vladimír Matolín; Michael Nolan; M. Verónica Gandu...; Sanjaya D. Senana...; José A. Rodriguez
• Keywords: Carbon dioxide reforming

Abstract Studies with a series of metal/ceria(111) (metal=Co, Ni, Cu; ceria=CeO 2 ) surfaces indicate that metal–oxide interactions can play very important role for the activation methane and its reforming CO at relatively low temperatures (600–700 K). Among systems examined, Co/CeO (111) exhibits best performance Cu/CeO has negligible activity. Experiments using ambient pressure X‐ray photoelectron spectroscopy dissociates on as 300 K—generating CH x species catalyst surface. The results density functional calculations show reduction in barrier from 1.07 eV Co(0001) to 0.87 Co 2+ /CeO (111), only 0.05 0 2− (111). At 700 K, under dry conditions, oxide surface catalytic cycle is established without coke deposition. A significant part formed recombines yield ethane or ethylene.