scholarly journals Facile benzene reduction promoted by a synergistically coupled Cu–Co–Ce ternary mixed oxide

2020 ◽  
Vol 11 (22) ◽  
pp. 5766-5771
Author(s):  
Hao Chen ◽  
Wenwen Lin ◽  
Zihao Zhang ◽  
Zhenzhen Yang ◽  
Kecheng Jie ◽  
...  
Keyword(s):  
Mixed Oxide ◽  
Aromatic Rings ◽  
Metal Composites ◽  
Mild Conditions ◽  
Earth Abundant ◽  
Ternary Mixed Oxide

Hydrogenation of aromatic rings promoted by earth-abundant metal composites under mild conditions is an attractive and challenging subject in the long term.

Fluoride removal efficiency from aqueous solution by synthetic iron(III)–aluminum(III)–chromium(III) ternary mixed oxide

Desalination ◽  
2010 ◽  
Vol 255 (1-3) ◽  
pp. 44-51 ◽  
Author(s):  
Krishna Biswas ◽  
Kaushik Gupta ◽  
Arijit Goswami ◽  
Uday Chand Ghosh
Keyword(s):  
Aqueous Solution ◽  
Removal Efficiency ◽  
Mixed Oxide ◽  
Fluoride Removal ◽  
Ternary Mixed Oxide

Effects induced by interaction of the Pt/CeOx/ZrOx/γ-Al2O3 ternary mixed oxide DeNOx catalyst with hydrogen

2020 ◽  
Vol 357 ◽  
pp. 664-674 ◽  
Author(s):  
Stanislava Andonova ◽  
Zehra Aybegüm Ok ◽  
Emrah Ozensoy ◽  
Konstantin Hadjiivanov
Keyword(s):  
Mixed Oxide ◽  
Ternary Mixed Oxide ◽  
Denox Catalyst

Aluminium complex as an efficient catalyst for the chemo-selective reduction of amides to amines

2019 ◽  
Vol 48 (31) ◽  
pp. 11978-11984 ◽  
Author(s):  
Suman Das ◽  
Himadri Karmakar ◽  
Jayeeta Bhattacharjee ◽  
Tarun K. Panda
Keyword(s):  
Selective Reduction ◽  
Solvent Free ◽  
Free Base ◽  
Efficient Catalyst ◽  
Mild Conditions ◽  
Earth Abundant

Catalytic chemo-selective reduction of tert-amides with pinacolborane (HBpin) to furnish the corresponding tert-amines using an Earth-abundant Al complex under solvent-free, base-free and mild conditions is reported.

scholarly journals Silica-supported sulfonic acids as recyclable catalyst for esterification of levulinic acid with stoichiometric amounts of alcohols

2016 ◽  
Vol 12 ◽  
pp. 2173-2180 ◽  
Author(s):  
Raimondo Maggi ◽  
N Raveendran Shiju ◽  
Veronica Santacroce ◽  
Giovanni Maestri ◽  
Franca Bigi ◽  
...  
Keyword(s):  
Sulfonic Acid ◽  
Levulinic Acid ◽  
Active Sites ◽  
Solid Acid ◽  
Value Added ◽  
Acid Catalysts ◽  
Mild Conditions ◽  
Simple Protocol ◽  
Sulfonic Acid Groups

Converting biomass into value-added chemicals holds the key to sustainable long-term carbon resource management. In this context, levulinic acid, which is easily obtained from cellulose, is valuable since it can be transformed into a variety of industrially relevant fine chemicals. Here we present a simple protocol for the selective esterification of levulinic acid using solid acid catalysts. Silica supported sulfonic acid catalysts operate under mild conditions and give good conversion and selectivity with stoichiometric amounts of alcohols. The sulfonic acid groups are tethered to the support using organic tethers. These tethers may help in preventing the deactivation of the active sites in the presence of water.

The influence of long-term exposure of Mg–Al mixed oxide at ambient conditions on its transition to hydrotalcite

2021 ◽  
pp. 122556
Author(s):  
Jaroslav Kocík ◽  
Martin Hájek ◽  
Zdeněk Tišler ◽  
Kateřina Strejcová ◽  
Romana Velvarská ◽  
...  
Keyword(s):  
Mixed Oxide ◽  
Ambient Conditions

Long-Term Stability of Optical Properties of Colloidal CdSe Nanocrystals in Polymer Matrices

2019 ◽  
Vol 18 (03n04) ◽  
pp. 1940052
Author(s):  
Yu. M. Azhniuk ◽  
V. V. Lopushansky ◽  
A. V. Gomonnai ◽  
B. V. Lopushanska ◽  
A. E. Raevskaya ◽  
...  
Keyword(s):  
Optical Properties ◽  
Optical Absorption ◽  
Polyvinyl Alcohol ◽  
Aqueous Solutions ◽  
Polymer Matrices ◽  
Cdse Nanocrystals ◽  
Term Stability ◽  
Long Term Stability ◽  
Mild Conditions

Properties of CdSe nanocrystals (NCs) fabricated in aqueous solutions at relatively mild conditions in the presence of gelatine and stabilized in polymer (gelatine, gelatine + polyvinylpyrrolidone, polyvinyl alcohol) matrices are characterized by Raman, optical absorption and photoluminescence spectroscopies. The effect of heating of the reaction mixture on the average NC size is discussed.

scholarly journals Effects of Promoter on Structural and Surface Properties of Zirconium Oxide-Based Catalyst Materials

Molecules ◽  
2020 ◽  
Vol 25 (11) ◽  
pp. 2619
Author(s):  
Ekaterina S. Borovinskaya ◽  
Steffen Oswald ◽  
Wladimir Reschetilowski
Keyword(s):  
Surface Properties ◽  
Mixed Oxide ◽  
Zirconium Oxide ◽  
Active Sites ◽  
Surface Composition ◽  
One Pot ◽  
Oxide Systems ◽  
Catalytically Active ◽  
Temperature Programmed ◽  
Ternary Mixed Oxide

Ternary mixed oxide systems CuO/ZnO/ZrO2 and CuO/NiO/ZrO2 were synthesized by one-pot synthesis for a better understanding of the synthesis-property relationships of zirconium oxide-based catalyst materials. The prepared mixed oxide samples were analysed by a broad range of characterisation methods (XRD, N2-physisorption, Temperature-Programmed Ammonia Desorption (TPAD), and XPS) to examine the structural and surface properties, as well as to identify the location of the potential catalytically active sites. By XPS analysis, it could be shown that a progressive enrichment of the surface composition with copper takes place by changing from ZnO to NiO as a promoter. Thus, by addition of the second component, not only electronic but also the geometric properties of active sites, i.e., copper species distribution within the catalyst surface, can be affected in a desired way.

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