Synthesis and Unique Catalytic Performance of Single-Site Ti-Containing Hierarchical Macroporous Silica with Mesoporous Frameworks

Langmuir ◽  
2011 ◽  
Vol 27 (6) ◽  
pp. 2873-2879 ◽  
Author(s):  
Takashi Kamegawa ◽  
Norihiko Suzuki ◽  
Michel Che ◽  
Hiromi Yamashita
Keyword(s):  
Catalytic Performance ◽  
Single Site ◽  
Macroporous Silica

scholarly journals Comparison in thermal stability and catalytic performance of H4PMo11VO40 heteropolyacid supported on mesoporous and macroporous silica materials

2020 ◽  
pp. 174751982092599
Author(s):  
Heng Zhang ◽  
Chunhao Yang ◽  
Shengying Zhao ◽  
Tingting Wang ◽  
Wancheng Zhu
Keyword(s):  
Thermal Stability ◽  
Active Sites ◽  
Catalytic Performance ◽  
High Dispersion ◽  
High Exposure ◽  
Macroporous Silica ◽  
One Dimensional ◽  
Ordered Macroporous ◽  
The One ◽  
Mcm 41

Ordered mesoporous silica, SBA-15 and MCM-41, and three-dimensionally ordered macroporous SiO2 were used as the supports of H4PMo11VO40 heteropolyacid for methacrolein oxidation. The dispersion and structural evolutions of the heteropolyacid along with thermal treatment were investigated. It was found that the heteropolyacid entered the one-dimensional mesoporous channels of SBA-15 and MCM-41, and the crystallization and growth were limited, leading to high dispersion of the heteropolyacid. However, the thermal stability was decreased under high dispersion. The migration of the heteropolyacid was observed to the end of the one-dimensional channels of SBA-15 and the outer surface of MCM-41 with calcination, accompanied by the decomposition of the heteropolyacid and the formation of MoO3. In comparison, the crystallization and growth of heteropolyacid were not limited in the open macropores of three-dimensionally ordered macroporous SiO2. Dispersed particles on the surface of the macropores with size of about 5 nm exhibited a higher thermal stability. The decomposition of the heteropolyacid in the SBA-15 and MCM-41 supported catalysts resulted in the loss of strong acid sites, causing low selectivity to methacrylic acid in methacrolein oxidation. High thermal stability with high exposure of the active sites in the three-dimensionally ordered macroporous SiO2 supported catalyst contributed to the enhancement in the catalytic performance.

Synthesis, Characterization, and Catalytic Performance of Single-Site Iron(III) Centers on the Surface of SBA-15 Silica

2002 ◽  
Vol 124 (44) ◽  
pp. 13194-13203 ◽  
Author(s):  
Chika Nozaki ◽  
Claus G. Lugmair ◽  
Alexis T. Bell ◽  
T. Don Tilley
Keyword(s):  
Catalytic Performance ◽  
Single Site

Enhanced light-driven catalytic performance of cytochrome P450 confined in macroporous silica

2016 ◽  
Vol 52 (49) ◽  
pp. 7703-7706 ◽  
Author(s):  
Jusheng Lu ◽  
Yanfei Shen ◽  
Songqin Liu
Keyword(s):  
Cytochrome P450 ◽  
Conversion Efficiency ◽  
Catalytic Performance ◽  
Fast Diffusion ◽  
Macroporous Silica ◽  
Macroporous Material ◽  
Biocatalytic Reaction

A light-driven approach combined with a macroporous reactor for the enzymatic biocatalytic reaction has been developed by confining the enzyme/photosensitizer nanohybrids in a macroporous material, which exhibits high bio-conversion efficiency due to the fast diffusion and collision between the enzyme/photosensitizer nanohybrid and the substrate in the reactor.

scholarly journals Influence of linkers on the Kuratowski-type secondary building unit in nickel single-site MOFs for ethylene oligomerization catalysis: a computational study

2021 ◽  
Author(s):  
Daniela E. Ortega ◽  
Ricardo A. Matute
Keyword(s):  
Computational Study ◽  
Catalytic Performance ◽  
Ethylene Oligomerization ◽  
Single Site ◽  
Secondary Building Unit ◽  
Building Unit

Ni-Kuratowski-type MOFs were studied computationally for ethylene oligomerization and the catalytic performance of sterically different linkers was elucidated.

Single-site and nanosized Fe–Co electrocatalysts for oxygen reduction: Synthesis, characterization and catalytic performance

2011 ◽  
Vol 196 (5) ◽  
pp. 2519-2529 ◽  
Author(s):  
Valentina Bambagioni ◽  
Claudio Bianchini ◽  
Jonathan Filippi ◽  
Alessandro Lavacchi ◽  
Werner Oberhauser ◽  
...  
Keyword(s):  
Oxygen Reduction ◽  
Catalytic Performance ◽  
Single Site

scholarly journals The surface properties of aluminated meso–macroporous silica and its catalytic performance as hydrodesulfurization catalyst support

2017 ◽  
Vol 14 (2) ◽  
pp. 424-433 ◽  
Author(s):  
Zhi-Gang Wang ◽  
Jia-Ning Pei ◽  
Sheng-Li Chen ◽  
Zheng Zhou ◽  
Gui-Mei Yuan ◽  
...  
Keyword(s):  
Surface Properties ◽  
Catalyst Support ◽  
Catalytic Performance ◽  
Macroporous Silica

Effect of hierarchical meso–macroporous structures on the catalytic performance of silica supported cobalt catalysts for Fischer–Tropsch synthesis

2017 ◽  
Vol 7 (17) ◽  
pp. 3812-3822 ◽  
Author(s):  
Hansheng Li ◽  
Bo Hou ◽  
Jungang Wang ◽  
Xin Huang ◽  
Congbiao Chen ◽  
...  
Keyword(s):  
Sol Gel ◽  
Catalytic Performance ◽  
Tropsch Synthesis ◽  
Cobalt Catalysts ◽  
Fischer Tropsch ◽  
Macroporous Silica ◽  
Fischer Tropsch Synthesis ◽  
Silica Supports ◽  
Sol Gel Process ◽  
Supported Cobalt Catalysts

A series of meso–macroporous silica supports with the same macroporous diameter but different mesoporous diameters were prepared by introducing phase separation into a sol–gel process and used to prepare cobalt catalysts for Fischer–Tropsch synthesis.

Single-Site Palladium(II) Catalyst for Oxidative Heck Reaction: Catalytic Performance and Kinetic Investigations

ACS Catalysis ◽  
2015 ◽  
Vol 5 (6) ◽  
pp. 3752-3759 ◽  
Author(s):  
Hui Duan ◽  
Menghuan Li ◽  
Guanghui Zhang ◽  
James R. Gallagher ◽  
Zhiliang Huang ◽  
...  
Keyword(s):  
Heck Reaction ◽  
Catalytic Performance ◽  
Single Site ◽  
Kinetic Investigations
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