Role and dynamics of transition metal carbides in methane coupling† † Electronic supplementary information (ESI) available. See DOI: https://doi.org/10.1039/d3sc01054f

ABSTRACT: Transition metal carbides have numerous applications and are known to excel in terms of hardness, thermal stability and conductivity. In particular, the Pt-like behavior of Mo and W carbides has led to the popularization of metal carbides in catalysis, ranging from electrochemically-driven reactions to thermal methane coupling. Herein, we show the active participation of carbidic carbon in the formation of C2 products during methane coupling at high temperature that is associated with the dynamics of Mo and W carbides. A detailed mechanistic study reveals that the catalyst performance of these metal carbides can be traced back to its carbon diffusivity and exchange capability upon interaction with methane (gas phase carbon). A stable C2 selectivity over time on stream for Mo carbide (Mo2C)

SUBMITTER: Zhang S 

PROVIDER: S-EPMC10246698 | biostudies-literature | 2023 May

REPOSITORIES: biostudies-literature