scholarly journals Mesoporous cerium–zirconium oxides modified with gold and copper – synthesis, characterization and performance in selective oxidation of glycerol

RSC Advances ◽  
2017 ◽  
Vol 7 (13) ◽  
pp. 7801-7819 ◽  
Author(s):  
Piotr Kaminski ◽  
Maria Ziolek ◽  
Jeroen A. van Bokhoven
Keyword(s):  
Selective Oxidation ◽  
Glyceric Acid ◽  
Glycerol Oxidation ◽  
Zirconium Oxides ◽  
And Performance

Au–Cu interaction on Ce–Zr oxides leads to the increase of activity in glycerol oxidation and selectivity to glyceric acid.

scholarly journals Platinum nanoparticles supported on N-doped carbon nanotubes for the selective oxidation of glycerol to glyceric acid in a base-free aqueous solution

RSC Advances ◽  
2015 ◽  
Vol 5 (40) ◽  
pp. 31566-31574 ◽  
Author(s):  
Shasha Chen ◽  
Puyu Qi ◽  
Jin Chen ◽  
Youzhu Yuan
Keyword(s):  
Carbon Nanotubes ◽  
Aqueous Solution ◽  
Molecular Oxygen ◽  
Selective Oxidation ◽  
Platinum Nanoparticles ◽  
Atmospheric Pressure ◽  
Glyceric Acid ◽  
Glycerol Oxidation ◽  
Glycerol Conversion ◽  
Oxidation With Molecular Oxygen

Pt/N-CNT out-performed Pt/CNT for glycerol oxidation with molecular oxygen under atmospheric pressure in a base-free aqueous solution, in terms of glycerol conversion and glyceric acid selectivity.

scholarly journals Selective Oxidation of Glycerol Using 3% H2O2 Catalyzed by Supported Nano-Au Catalysts

Catalysts ◽  
2018 ◽  
Vol 8 (11) ◽  
pp. 505 ◽  
Author(s):  
Xiaoli Wang ◽  
Gongde Wu ◽  
Tongfa Jin ◽  
Jie Xu ◽  
Shihao Song
Keyword(s):  
Transition Metal ◽  
Metal Oxides ◽  
Selective Oxidation ◽  
Mixed Oxide ◽  
Transition Metal Oxides ◽  
Mixed Oxides ◽  
Catalytic Performance ◽  
Glyceric Acid ◽  
Glycerol Conversion ◽  
Composition And Structure

A series of transition metal oxides or mixed oxides supported nano-Au catalysts were prepared for the selective oxidation of glycerol to glyceric acid using 3% H2O2. It was found that the composition and structure of supports significantly influenced the catalytic performance of catalysts. The mesoporous trimetal mixed oxide (CuNiAlO) supported nano-Au catalysts were more active in comparison with the others. In the present catalytic system, the highest glycerol conversion was 90.5%, while the selectivity of glyceric acid could reach 72%. Moreover, the catalytic performance remained after 11 times of reaction.

Efficient and stable platinum nanocatalysts supported over Ca-doped ZnAl2O4 spinels for base-free selective oxidation of glycerol to glyceric acid

2019 ◽  
Vol 477 ◽  
pp. 110559 ◽  
Author(s):  
Zhengya Han ◽  
Renfeng Xie ◽  
Yihui Song ◽  
Guoli Fan ◽  
Lan Yang ◽  
...  
Keyword(s):  
Selective Oxidation ◽  
Glyceric Acid

Deactivation and regeneration of in situ formed bismuth-promoted platinum catalyst for the selective oxidation of glycerol to dihydroxyacetone

2018 ◽  
Vol 42 (23) ◽  
pp. 18837-18843 ◽  
Author(s):  
Xiaomei Ning ◽  
Liang Zhan ◽  
Hongjuan Wang ◽  
Hao Yu ◽  
Feng Peng
Keyword(s):  
Selective Oxidation ◽  
Platinum Catalyst ◽  
Pt Catalyst ◽  
Glycerol Oxidation

Glycerol oxidation over a Pt catalyst can be effectively enhanced by a Bi additive in terms of activity and 1,3-dihydroxyacetone (DHA) selectivity.

Au Supported TiO2-Nanofibers as Novel Catalysts for Glycerol Oxidation

2018 ◽  
Vol 762 ◽  
pp. 294-299 ◽  
Author(s):  
Svetlana Chornaja ◽  
Reinis Drunka ◽  
Konstantins Dubencovs ◽  
Svetlana Zhizhkuna ◽  
Dzidra Jankovica ◽  
...  
Keyword(s):  
Synthesis Method ◽  
Chemical Deposition ◽  
Molar Ratio ◽  
Glyceric Acid ◽  
Glycerol Oxidation ◽  
Glycerol Water ◽  
Glycerol Conversion ◽  
Catalytically Active ◽  
Chemical Deposition Method ◽  
By Products

Composites of Au supported on the TiO2-nanofibers (Au/NF-TiO2) were synthesized and tested in glycerol oxidation processes. TiO2-nanofibers were prepared by a microwave-assisted hydrothermal synthesis method. Chemical deposition method was used for nanofibers modification with Au nanoparticles. Oxidation of aqueous glycerol solutions by molecular oxygen in the presence of Au/NF-TiO2 nanocomposites was performed. It was found that Au/NF-TiO2 composites are catalytically active in alkaline glycerol water solutions. The main product of glycerol catalytic oxidation was glyceric acid, by-products were – tartronic, lactic, glycolic, oxalic, acetic and formic acid. It was shown that Au/NF-TiO2 catalysts’ activity and selectivity depend on Au weight loading, glycerol/Au molar ratio, oxygen pressure and NaOH initial concentration. The best result was achieved using the 0.5 wt%Au/NF-TiO2 catalyst: selectivity by glyceric acid was 76% with glycerol conversion 100%.

scholarly journals Effect of the Chemical Composition of Mesoporous Cerium-Zirconium Oxides on the Modification with Sulfur and Gold Species and Their Application in Glycerol Oxidation

2017 ◽  
Author(s):  
Piotr Kaminski
Keyword(s):  
Chemical Composition ◽  
Surface Properties ◽  
Oxidation State ◽  
Glycerol Oxidation ◽  
Test Reaction ◽  
Zirconium Oxides ◽  
Redox Sites ◽  
State Of Metals ◽  
Mesoporous Oxides

Ceria, zirconia and mixed cerium-zirconium mesoporous oxides were synthesized and used as supports for sulfur and gold species. The materials were characterised using selected advanced techniques (ICP-OES, elemental analysis, XPS, XRD, N2 adsorption and desorption isotherms, UV-vis, ATR-FTIR, TPR-H2, TG-DTA) which allowed monitoring of the oxidation state of metals (cerium and gold) and the surface properties of the catalysts, in particular the concentration of the components on the surface and in the bulk of materials. The interactions between gold, sulfur and metals from oxides were considered. The goal of this work was studied the changes in the chemical composition of materials and the oxidation states of cerium species after the modification of oxides with sulfur and gold species and the estimation of the influence of these changes on the surface properties. The chemical composition of surface affects the mobility of surface oxygen and the oxidation state of cerium, which can play the role of redox sites (e.g. Ce3+/Ce4+ species), and therefore it strongly influences on the adsorption of hydrogen sulfide and then gold loading. Additionally, gold catalysts modified with sulfur species were tested in the reaction of glycerol oxidation in the liquid phase at basic conditions as the test reaction of the catalytic oxidation of organic pollutants from water.

scholarly journals Promoting effect of solvent on Cu/CoO catalyst for selective glycerol oxidation under alkaline conditions

2018 ◽  
Vol 8 (19) ◽  
pp. 4891-4899 ◽  
Author(s):  
Georgios Dodekatos ◽  
Jan Ternieden ◽  
Stefan Schünemann ◽  
Claudia Weidenthaler ◽  
Harun Tüysüz
Keyword(s):  
Selective Oxidation ◽  
Aqueous Phase ◽  
Glycerol Oxidation ◽  
Promoting Effect ◽  
Effect Of Solvent ◽  
Alkaline Conditions

Cu/CoO catalysts were employed for the selective oxidation of glycerol in the aqueous phase under basic conditions.

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