Sulfated zirconia in SBA-15 structures with strong Bronsted acidity as observed by H-1 MAS NMR spectroscopy


Degirmenci V. , Erdem O. F. , Yilmaz A. , Michel D., Uner D.

CATALYSIS LETTERS, cilt.115, ss.79-85, 2007 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 115
  • Basım Tarihi: 2007
  • Doi Numarası: 10.1007/s10562-007-9078-9
  • Dergi Adı: CATALYSIS LETTERS
  • Sayfa Sayıları: ss.79-85

Özet

In order to prepare high surface area highly acidic catalysts, different weight loadings of ZrO2 were incorporated in the SBA-15 structures which are subsequently sulfated by treating in 0.25 M H2SO4. The catalysts were characterized by means of TEM, XRD, N-2 adsorption, and H-1 MAS NMR. Bronsted type acidities of sulfated zirconia included SBA-15 materials were identified by a sharp H-1 MAS NMR line at 10.6 ppm. The highest acidity was obtained in the 25 mol% ZrO2 included SBA-15 catalyst with a BET surface area of 246 m(2)/g.