Probing the active sites for methane activation on Ga/ZSM-5 zeolites with solid-state NMR spectroscopy
Xingling Zhao, Yueying Chu, Guodong Qi, Qiang Wang, Wei Gao, Xiang Wang, Shenhui Li, Jun Xu, Feng Deng
Abstract
clusters on Ga/ZSM-5 zeolites are probed by solid-state NMR. These two types of Ga species show strong Lewis acidity and are quantitatively correlated with the catalytic activity of Ga/ZSM-5 for methane C-H bond activation. The interaction between the surface Ga species and zeolite is characterized by using double-resonance solid-state NMR spectroscopy, which provides direct spectroscopic evidence for the location and distribution of active Ga species. These results provide new insight into the understanding of the nature and role of Ga species in Ga-modified zeolites for the conversion of light alkanes.
Topics & Concepts
CatalysisZeoliteSolid-state nuclear magnetic resonanceZSM-5ChemistryNuclear magnetic resonance spectroscopySpectroscopyMethanePhysical chemistryPhotochemistryOrganic chemistryNuclear magnetic resonancePhysicsQuantum mechanicsZeolite Catalysis and SynthesisAdvanced NMR Techniques and ApplicationsChemical Synthesis and Characterization