Heterogeneous enantioselective synthesis of chromans via the oxa-Michael–Michael cascade reaction synergically catalyzed by grafted chiral bases and inherent hydroxyls on mesoporous silica surface

2017 ◽  
Vol 53 (63) ◽  
pp. 8882-8885 ◽  
Author(s):  
Shanshan Wang ◽  
Jing He ◽  
Zhe An
Keyword(s):  
Mesoporous Silica ◽  
Michael Reaction ◽  
Silica Surface ◽  
Catalytic Performance ◽  
Cascade Reaction ◽  
Enantioselective Synthesis ◽  
Bifunctional Catalysts ◽  
Excellent Catalytic Performance

A heterogeneous enantioselective oxa-Michael–Michael reaction for the synthesis of chromans has been developed on bifunctional catalysts, resulting in excellent catalytic performance.

Sulfated ZrO2 Supported on HMS Mesoporous Silica for Catalytic Epoxidation of Soybean Oil

2011 ◽  
Vol 233-235 ◽  
pp. 198-201
Author(s):  
Xue Feng Li ◽  
Wei Yun Guo ◽  
Huan Xin Gao ◽  
Qing Ling Chen
Keyword(s):  
Catalytic Activity ◽  
Mesoporous Silica ◽  
Soybean Oil ◽  
Pore Structure ◽  
Calcination Temperature ◽  
Sulfated Zirconia ◽  
Catalytic Performance ◽  
Catalytic Epoxidation ◽  
Epoxy Value ◽  
Excellent Catalytic Performance

Sulfated zirconia supported on HMS mesoporous silica (SZ-HMS) was prepared and evaluated by catalytic epoxidation of soybean oil. The preparation procedure of SZ-HMS included soaking of HMS with ZrOCl2, and then sulfating with H2SO4. The samples were characterized by IR, XRD, and N2-adsorption. SZ-HMS kept the typical mesoporous crystalline as well as pore structure and exhibited an excellent catalytic performance for the epoxidation of soybean oil. The best catalytic activity, 4.4 of epoxy value, is acquired over the SZ-HMS sample prepared by 0.2 mol/L of ZrOCl2 concentration, 0.75 mol/L of H2SO4 concentration, and 823 K of calcination temperature.

Efficient Mukaiyama aldol reaction in water with TiO4 tetrahedra on a hydrophobic mesoporous silica surface

2014 ◽  
Vol 50 (88) ◽  
pp. 13473-13476 ◽  
Author(s):  
Hiroshi Shintaku ◽  
Kiyotaka Nakajima ◽  
Masaaki Kitano ◽  
Michikazu Hara
Keyword(s):  
Mesoporous Silica ◽  
Heterogeneous Catalyst ◽  
Silica Surface ◽  
Aldol Condensation ◽  
Aldol Reaction ◽  
Catalytic Performance ◽  
Reusable Catalyst ◽  
Mukaiyama Aldol Reaction ◽  
Mukaiyama Aldol ◽  
Reaction In Water

A new heterogeneous catalyst, hydrophobic TiO4-deposited mesoporous silica, exhibited high catalytic performance as a reusable catalyst for the Mukaiyama-aldol condensation in water without a surfactant.

Fabrication and Excellent Catalytic Performance of Three-dimensional Ordered Mesoporous Molybdenum Oxides

2014 ◽  
Vol 29 (2) ◽  
pp. 124-130 ◽  
Author(s):  
Yu-Cheng DU ◽  
Guang-Wei ZHENG ◽  
Qi MENG ◽  
Li-Ping WANG ◽  
Hai-Guang FAN ◽  
...  
Keyword(s):  
Three Dimensional ◽  
Catalytic Performance ◽  
Molybdenum Oxides ◽  
Ordered Mesoporous ◽  
Excellent Catalytic Performance

Co a Sm b O x Catalyst with Excellent Catalytic Performance for NH 3 Decomposition

2021 ◽  
Author(s):  
Cui‐Ping Wu ◽  
Zhao Jin ◽  
Kai Xu ◽  
Wei‐Wei Wang ◽  
Chun‐Jiang Jia
Keyword(s):  
Catalytic Performance ◽  
Excellent Catalytic Performance

PtPd nanoframes derived from Pd@PdPt core–shell rhombic dodecahedrals with excellent catalytic performance toward methanol oxidation

2021 ◽  
Author(s):  
Yangyang Ren ◽  
Chuanliang Li ◽  
Baosong Li ◽  
Fan Gao ◽  
Xinghua Zhang ◽  
...  
Keyword(s):  
Methanol Oxidation ◽  
Catalytic Properties ◽  
Catalytic Performance ◽  
Core Shell ◽  
Acid Environment ◽  
Excellent Catalytic Performance

PtPd nanoframes with excellent catalytic properties were obtained by etching Pd@PdPt core–shell RDs with Fe3+ in an acid environment.

Rational construction of hierarchical SAPO-34 with enhanced MTO performance without an additional meso/macropore template

2021 ◽  
Author(s):  
Yafei Liang ◽  
Beibei Gao ◽  
Lipeng Zhou ◽  
Xiaomei Yang ◽  
Tianliang Lu ◽  
...  
Keyword(s):  
Catalytic Performance ◽  
Mto Reaction ◽  
Rational Construction ◽  
Excellent Catalytic Performance

A facile approach has been developed to fabricate hierarchical SAPO-34 with large intracrystalline meso/macropores and excellent catalytic performance in the MTO reaction.

scholarly journals Fe3 Cluster Anchored on the C2N Monolayer for Efficient Electrochemical Nitrogen Fixation

Catalysts ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 974
Author(s):  
Bing Han ◽  
Haihong Meng ◽  
Fengyu Li ◽  
Jingxiang Zhao
Keyword(s):  
Nitrogen Fixation ◽  
First Principles ◽  
Catalytic Performance ◽  
Reduction Reaction ◽  
First Principles Calculations ◽  
Ammonia Gas ◽  
Nitrogen Reduction ◽  
Single Cluster ◽  
Excellent Catalytic Performance ◽  
Production Of Ammonia

Under the current double challenge of energy and the environment, an effective nitrogen reduction reaction (NRR) has become a very urgent need. However, the largest production of ammonia gas today is carried out by the Haber–Bosch process, which has many disadvantages, among which energy consumption and air pollution are typical. As the best alternative procedure, electrochemistry has received extensive attention. In this paper, a catalyst loaded with Fe3 clusters on the two-dimensional material C2N (Fe3@C2N) is proposed to achieve effective electrochemical NRR, and our first-principles calculations reveal that the stable Fe3@C2N exhibits excellent catalytic performance for electrochemical nitrogen fixation with a limiting potential of 0.57 eV, while also suppressing the major competing hydrogen evolution reaction. Our findings will open a new door for the development of non-precious single-cluster catalysts for effective nitrogen reduction reactions.

Amino-functionalized Cu-MOF for efficient purification of methane from light hydrocarbons and excellent catalytic performance

2019 ◽  
Vol 6 (5) ◽  
pp. 1152-1157 ◽  
Author(s):  
Xia Wang ◽  
Xiurong Zhang ◽  
Kai Zhang ◽  
Xiaokang Wang ◽  
Yutong Wang ◽  
...  
Keyword(s):  
Catalytic Performance ◽  
Light Hydrocarbons ◽  
Excellent Catalytic Performance

Amino-functionalized Cu-MOF for the efficient purification of methane from light hydrocarbons and excellent catalytic performance.

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