Study of H-ZSM-5 acidity by 1H NMR: broad-line at 4 K and high resolution MAS at 300 K; Brønsted acidity scale and comparison with other zeolites

The acidity of niobic acid studied by 1H

The acidity of niobic acid studied by 1H broad-line NMR at 4 K and H MAS NMR at room temperature: comparison with other solid acids

✍ Patrice Batamack; Robert Vincent; Jacques Fraissard 📂 Article 📅 1996 🏛 Elsevier Science 🌐 English ⚖ 848 KB

The acidity of niobium pentoxide calcined at 573 K has been studied by interacting water molecules and the solid acid using 'H broad-line NMR at 4 K and MAS NMR at room temperature. 'H Broad-line NMR in 'rigid lattice' conditions allows the determination of the numbers of the oxygen-protonated speci