Hierarchical Echinus-like Cu-MFI Catalysts for Ethanol Dehydrogenation

摘要

Copper-based catalysts have been widely considered in the non-oxidative dehydrogenation of ethanol but suffer from deactivation troubles. Herein, a hierarchical echinus-like Cu-MFI-AE catalyst was developed, which exhibited a high yield of acetaldehyde and unprecedented stability. The formation of Cu–O–Si on the interface of Cu and hierarchical MFI avoids the aggregation of Cu nanoparticles and stabilizes the Cu~(+) species. The Cu~(+) and Cu~(0) species perform a synergetic mechanism, with Cu~(+) involving into acetaldehyde generation and Cu~(0) serving as H_(2) liberation sites. The utilization of interfacial interactions is an effective method in stabilizing metal nanoparticles without affecting the active sites for ethanol conversion.