Heterogenized vanadyl cations over modified silica surfaces: A comprehensive understanding toward the structural property and catalytic activity difference over mesoporous and amorphous silica supports

2006 ◽  
Vol 244 (1) ◽  
pp. 52-64 ◽  
Author(s):  
S SHYLESH ◽  
A SINGH
Keyword(s):  
Catalytic Activity ◽  
Structural Property ◽  
Amorphous Silica ◽  
Comprehensive Understanding ◽  
Modified Silica ◽  
Silica Surfaces ◽  
Silica Supports ◽  
Activity Difference

Complex Formation and Dissociation Dynamics on Amorphous Silica Surfaces

2021 ◽  
Author(s):  
Steven A. Yamada ◽  
Samantha T. Hung ◽  
Jae Yoon Shin ◽  
Michael D. Fayer
Keyword(s):  
Complex Formation ◽  
Amorphous Silica ◽  
Silica Surfaces ◽  
Dissociation Dynamics

Adsorption of cyclohexane and benzene on two modified silica supports

1975 ◽  
Vol 79 (23) ◽  
pp. 2555-2562 ◽  
Author(s):  
Donald Barry ◽  
Martha Cook
Keyword(s):  
Modified Silica ◽  
Silica Supports

Catalytic Activity of Alumina-Modified Silica Gels in Methanol Conversion to Dimethyl Ether

2021 ◽  
Vol 94 (5) ◽  
pp. 576-585
Author(s):  
Z. A. Temerdashev ◽  
A. S. Kostina ◽  
A. V. Rudenko ◽  
I. A. Kolychev ◽  
A. M. Vasil’ev
Keyword(s):  
Catalytic Activity ◽  
Dimethyl Ether ◽  
Methanol Conversion ◽  
Silica Gels ◽  
Modified Silica ◽  
Modified Silica Gels

scholarly journals Amino-Modified Silica as Effective Support of the Palladium Catalyst for 4-Nitroaniline Hydrogenation

Catalysts ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 375
Author(s):  
Adele R. Latypova ◽  
Maxim D. Lebedev ◽  
Evgeniy V. Rumyantsev ◽  
Dmitry V. Filippov ◽  
Olga V. Lefedova ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Catalytic Activity ◽  
Electron Donor ◽  
Photoelectron Spectroscopy ◽  
Functionalized Silica ◽  
Amino Groups ◽  
Modified Silica ◽  
Pulse Technique ◽  
X Ray ◽  
Transmission Electron

The article describes the synthesis of aminoorgano-functionalized silica as a prospective material for catalysis application. The amino groups have electron donor properties which are valuable for the metal chemical state of palladium. Therefore, the presence of electron donor groups is important for increasing catalysts’ stability. The research is devoted to the investigation of silica amino-modified support influence on the activity and stability of palladium species in 4-nitroaniline hydrogenation process. A series of catalysts with different supports such as SiO2, SiO2-C3H6-NH2 (amino-functionalized silica), γ-Al2O3 and activated carbon were studied. The catalytic activity was studied in the hydrogenation of 4-nitroaniline to 1,4-phenylenediamine. The catalysts were characterized by scanning electron microscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, Fourier transform infrared spectroscopy and chemisorption of hydrogen by the pulse technique. The 5 wt.% Pd/SiO2-C3H6-NH2 catalyst exhibited the highest catalytic activity for 4-nitroaniline hydrogenation with 100% conversion and 99% selectivity with respect to 1,4-phenylenediamine.

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