CHA zeolites display high selectivity toward CO2 adsorption, but the influence of the nature and concentration of their extra-framework cations on the formation of silanol sites, and the respective impact on CO2 sorption, is poorly understood. Here, the authors use high-resolution solid-state magic-angle spinning 1H NMR and Fourier-transform infrared spectroscopy to study the effects of post-synthetic exchange of extra-framework alkali-metal cations on silanol sites in nanosized CHA zeolites.
- Sajjad Ghojavand
- Eddy Dib
- Svetlana Mintova
