Investigation of surface methoxy groups on SAPO-34 A combined magic-angle turning NMR experimental approach with theoretical studies

Abstract

The formation of stable surface methoxy groups in various zeolite-catalysed reaction processes has been widely accepted as an important intermediate stage and the understanding of such an intermediacy is of great significance. ¹³C magic-angle-turning (MAT) NMR experiments, in conjunction with theoretical calculations of ¹³C shielding tensors, are employed to investigate the chemical and electronic nature of methoxy groups on H-SAPO-34.