Discovery of a new role of spillover hydrogen emitted by sulfided catalysts: creation of acidic sites on amorphous silica-alumina

1997 ◽  
pp. 211-220 ◽  
Author(s):  
A.M. Stumbo ◽  
P. Grange ◽  
B. Delmon
Keyword(s):  
Amorphous Silica ◽  
Sulfided Catalysts ◽  
Acidic Sites ◽  
Silica Alumina ◽  
Spillover Hydrogen

γ-Alumina and Amorphous Silica–Alumina: Structural Features, Acid Sites and the Role of Adsorbed Water

2017 ◽  
Vol 60 (19-20) ◽  
pp. 1554-1564 ◽  
Author(s):  
Vicente Sanchez Escribano ◽  
Gabriella Garbarino ◽  
Elisabetta Finocchio ◽  
Guido Busca
Keyword(s):  
Amorphous Silica ◽  
Adsorbed Water ◽  
Structural Features ◽  
Acid Sites ◽  
Silica Alumina

Nature, Structure and Strength of the Acidic Sites of Amorphous Silica Alumina:  An IR and NMR Study

2006 ◽  
Vol 110 (31) ◽  
pp. 15172-15185 ◽  
Author(s):  
G. Crépeau ◽  
V. Montouillout ◽  
A. Vimont ◽  
L. Mariey ◽  
T. Cseri ◽  
...  
Keyword(s):  
Amorphous Silica ◽  
Nmr Study ◽  
Acidic Sites ◽  
Silica Alumina

Acidity Characterization of Amorphous Silica–Alumina

2012 ◽  
Vol 116 (40) ◽  
pp. 21416-21429 ◽  
Author(s):  
Emiel J.M. Hensen ◽  
Dilip G. Poduval ◽  
Volkan Degirmenci ◽  
D.A J. Michel Ligthart ◽  
Wenbin Chen ◽  
...  
Keyword(s):  
Amorphous Silica ◽  
Silica Alumina

The role of nanoscale aggregation of ferrihydrite and amorphous silica in the natural attenuation of contaminant metals at mill tailings sites

2021 ◽  
Vol 298 ◽  
pp. 207-226
Author(s):  
Keisuke Kawamoto ◽  
Hiroki Yokoo ◽  
Asumi Ochiai ◽  
Yuriko Nakano ◽  
Ayaka Takeda ◽  
...  
Keyword(s):  
Amorphous Silica ◽  
Natural Attenuation ◽  
Mill Tailings ◽  
Contaminant Metals

Transfer hydrogenation of cinnamaldehyde with 2-propanol on Al2O3 and SiO2–Al2O3 catalysts: role of Lewis and Brønsted acidic sites

2017 ◽  
Vol 7 (19) ◽  
pp. 4511-4519 ◽  
Author(s):  
Zhan-Kun Gao ◽  
Yong-Chun Hong ◽  
Zhun Hu ◽  
Bo-Qing Xu
Keyword(s):  
Hydrogenation Reaction ◽  
Transfer Hydrogenation ◽  
Catalytic Transfer Hydrogenation ◽  
Basic Sites ◽  
Acidic Sites ◽  
Catalytic Transfer ◽  
Transfer Hydrogenation Reaction

Neither surface Brønsted acidic nor basic sites are involved in the catalytic transfer hydrogenation reaction of cinnamaldehyde with 2-propanol.

Revealing Brønsted Acidic Bridging SiOHAl Groups on Amorphous Silica–Alumina by Ultrahigh Field Solid-State NMR

2021 ◽  
pp. 11563-11572
Author(s):  
Zichun Wang ◽  
Kuizhi Chen ◽  
Yijiao Jiang ◽  
Julien Trébosc ◽  
Wenjie Yang ◽  
...  
Keyword(s):  
Solid State ◽  
Amorphous Silica ◽  
Solid State Nmr ◽  
Ultrahigh Field ◽  
Silica Alumina
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