Role and dynamics of transition metal carbides in methane coupling
Seraphine B. X. Y. Zhang, Quentin Pessemesse, Lukas Lätsch, Konstantin M. Engel, Wendelin J. Stark, Alexander P. van Bavel, Andrew D. Horton, Pierre‐Adrien Payard, Christophe Copéret
Abstract
C) can be rationalized by fast carbon diffusion dynamics, while W carbide (WC) shows loss of selectivity due to slow diffusion leading to surface carbon depletion. This finding showcases that the bulk carbidic carbon of the catalyst plays a crucial role and that the metal carbide is not only responsible for methyl radical formation. Overall, this study evidences the presence of a carbon equivalent to the Mars-Van Krevelen type mechanism for non-oxidative coupling of methane.
Topics & Concepts
MethaneCarbideTransition metalCoupling (piping)Carbon fibersChemical physicsMaterials scienceMetalChemistryMetallurgyCatalysisOrganic chemistryComposite materialComposite numberCatalytic Processes in Materials ScienceSurface Chemistry and CatalysisIonic liquids properties and applications