title: C-H bond activation over metal oxides: a new insight into the dissociation kinetics from density functional theory.
abstract: The C-H activation on metal oxides is a fundamental process in chemistry. In this paper, we report a density functional theory study on the process of the C-H activation of CH(4) on Pd(111), Pt(111), Ru(0001), Tc(0001), Cu(111), PdO(001), PdO(110), and PdO(100). A linear relationship between the C-H activation barrier and the chemisorption in the dissociation final state on the metal surfaces is obtained, which is consistent with the work in the literature. However, the relationship is poor on the metal oxide surfaces. Instead, a strong linear correlation between the barrier and the lattice O-H bond strength is found on the oxides. The new linear relationship is analyzed and the physical origin is identified.
authors.affiliation: Lab for Advanced Materials, Research Institute of Industrial Catalysis, East China University of Science and Technology, Shanghai 200237, People's Republic of China.
authors.forename: Hui-Ying
authors.initials: HY
authors.lastname: Li
authors.forename: Yang-Long
authors.initials: YL
authors.lastname: Guo
authors.forename: Yun
authors.initials: Y
authors.lastname: Guo
authors.forename: Guan-Zhong
authors.initials: GZ
authors.lastname: Lu
authors.forename: P
authors.initials: P
authors.lastname: Hu