Active Slingshot Geometry Site on Single-Atom La Catalyst Largely Promotes Oxidative Methane Coupling.

ABSTRACT: Oxidative methane coupling (OCM) has long been deemed a promising route for the direct conversion of methane to valuable ethylene. Despite its potential and many progresses, OCM's industrial implementation has been hampered by low C₂ yields and insufficient understanding of the reaction mechanism for catalyst design. In this study, we present a surface geometric modification strategy to enhance OCM performance. Single La atoms incorporated onto MgO surface (SA-La/MgO) form a unique La-O-Mg "slingshot" geometry. This configuration, driven by the large atomic radius of La and its valency mismatch with Mg, significantly activates surface lattice oxygen. These activated oxygen species initiate the OCM by reacting with methane, while the resulting oxygen vacancies are rapidly repleni

SUBMITTER: Wang L 

PROVIDER: S-EPMC12670278 | biostudies-literature | 2025 Nov

REPOSITORIES: biostudies-literature