Solid-state NMR of silica—alumina prepared by chemical vapor deposition
作者： Satoshi Sato , Toshiaki Sodesawa , Fumio Nozaki , Hiroshi Shoji
DOI: 10.1016/0304-5102(91)80026-Y
关键词: Brønsted–Lowry acid–base theory 、 Inorganic chemistry 、 Catalysis 、 Heterogeneous catalysis 、 Isomerization 、 Lewis acids and bases 、 Solid-state nuclear magnetic resonance 、 Chemistry 、 Amorphous silica-alumina 、 Cumene
摘要: Abstract A supported type of silica—alumina catalyst prepared by depositing silica on an alumina (CVD SiO2/Al2O3) was characterized solid-state magic-angle spinning (MAS) NMR measurement. The 31P MAS trimethylphosphine chemisorbed the elucidated a change in acid properties (Bronsted or Lewis type) with loading. sites surface were converted into Bronsted deposition silica. At lower loadings, both and existed. Above 12 wt.% loading, disappeared only observed. catalytic activities CVD SiO2/Al2O3 for cumene cracking 1-butene isomerization varied behaviors correlated amount generated deposition. 29Si deposited revealed microstructures which highly dispersed, forming bilayer, exhibited high strong acidity. Further layering decreased
elsevier.com
sci-hub.se 参考文章(17)
L.B. Welsha, J.-P. Gilson, M.J. Gattuso, High resolution 27Al NMR of amorphous silica-aluminas Applied Catalysis. ,vol. 15, pp. 327- 331 ,(1985) , 10.1016/S0166-9834(00)81846-1
Jack H. Lunsford, William P. Rothwell, Wenxia Shen, Acid sites in zeolite Y: a solid-state NMR and infrared study using trimethylphosphine as a probe molecule Journal of the American Chemical Society. ,vol. 107, pp. 1540- 1547 ,(1985) , 10.1021/JA00292A015
Gary E. Maciel, Dean W. Sindorf, Silicon-29 NMR study of the surface of silica gel by cross polarization and magic-angle spinning Journal of the American Chemical Society. ,vol. 102, pp. 7606- 7607 ,(1980) , 10.1021/JA00545A056
E. Lippmaa, M. Maegi, A. Samoson, G. Engelhardt, A. R. Grimmer, Structural studies of silicates by solid-state high-resolution silicon-29 NMR Journal of the American Chemical Society. ,vol. 102, pp. 4889- 4893 ,(1980) , 10.1021/JA00535A008
I.L. Mudrakovskii, V.M. Mastikhin, V.P. Shmachkova, N.S. Kotsarenko, High-resolution solid-state 29Si and 31P NMR of silicon-phosphorous compounds containing six-coordinated silicon Chemical Physics Letters. ,vol. 120, pp. 424- 426 ,(1985) , 10.1016/0009-2614(85)85633-5
M. Magi, E. Lippmaa, A. Samoson, G. Engelhardt, A. R. Grimmer, Solid-state high-resolution silicon-29 chemical shifts in silicates The Journal of Physical Chemistry. ,vol. 88, pp. 1518- 1522 ,(1984) , 10.1021/J150652A015
K SEGAWA, 31P-MASNMR spectroscopic studies with zirconium phosphate catalysts Journal of Catalysis. ,vol. 101, pp. 81- 89 ,(1986) , 10.1016/0021-9517(86)90231-9
Thomas. Bein, Robert F. Carver, Rodney D. Farlee, Galen D. Stucky, Solid-state silicon-29 NMR and infrared studies of the reactions of mono- and polyfunctional silanes with zeolite Y surfaces Journal of the American Chemical Society. ,vol. 110, pp. 4546- 4553 ,(1988) , 10.1021/JA00222A010
H. Knözinger, P. Ratnasamy, Catalytic Aluminas: Surface Models and Characterization of Surface Sites Catalysis Reviews-science and Engineering. ,vol. 17, pp. 31- 70 ,(1978) , 10.1080/03602457808080878
Jack H. Lunsford, Pierre N. Tutunjian, Po Jen Chu, Eshan B. Yeh, David J. Zalewski, Solid-state NMR study using trimethylphosphine as a probe of acid sites in normal and dealuminated zeolite Y The Journal of Physical Chemistry. ,vol. 93, pp. 2590- 2595 ,(1989) , 10.1021/J100343A068