Surface methoxy species bound to an extra-framework Al (SMS-EFAL) was unambiguously identified by advanced ¹³C-{²⁷Al} double‐resonance solid‐state NMR technique in the methanol-to-olefins reaction on H-ZSM-5 zeolite. The high reactivity of the SMS-EFAL leads to the formation of surface ethoxy species and ethanol as the key intermediates for ethene generation in the early reaction stage. A direct route for the initial C−C bond formation in ethene was proposed and corroborated by density functional theory calculations.

Link：https://onlinelibrary.wiley.com/doi/full/10.1002/anie.201805609