Electrochemical mechanism of Cr(iii) reduction for preparing crystalline chromium coatings based on 1-butyl-3-methylimidazolium hydrogen sulfate ionic liquid

RSC Advances ◽  
2014 ◽  
Vol 4 (109) ◽  
pp. 64174-64182 ◽  
Author(s):  
Xinkuai He ◽  
Chen Li ◽  
Qingyun Zhu ◽  
Bailong Hou ◽  
Yumei Jiang ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Electrochemical Reduction ◽  
Growth Process ◽  
Reduction Mechanism ◽  
Hydrogen Sulfate ◽  
Direct Electrodeposition ◽  
Electrochemical Mechanism ◽  
Nucleation Growth

We report a Cr(iii) electrochemical reduction mechanism and nucleation/growth process, and the direct electrodeposition of crystalline chromium coatings based on [BMIM]HSO4.

Electrochemical reduction mechanism of NbF5 and NbCl5 in the ionic liquid 1-butyl-1-methylpyrrolidinium trifluoromethanesulfonate

2019 ◽  
Vol 321 ◽  
pp. 134600 ◽  
Author(s):  
A. Endrikat ◽  
N. Borisenko ◽  
A. Ispas ◽  
R. Peipmann ◽  
F. Endres ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Electrochemical Reduction ◽  
Reduction Mechanism

scholarly journals The Electrochemical Mechanism of Preparing Mn from LiMn2O4 in Waste Batteries in Molten Salt

Crystals ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1066
Author(s):  
Jinglong Liang ◽  
Rui Zhang ◽  
Hui Li ◽  
Le Wang ◽  
Zongying Cai ◽  
...  
Keyword(s):  
Molten Salt ◽  
Electrochemical Reduction ◽  
Deionized Water ◽  
Reduction Mechanism ◽  
Constant Voltage ◽  
Intermediate Products ◽  
Electrochemical Mechanism

The electrochemical reduction mechanism of Mn in LiMn2O4 in molten salt was studied. The results show that in the NaCl-CaCl2 molten salt, the process of reducing from Mn (IV) to manganese is: Mn (IV)→Mn (III)→Mn (II)→Mn. LiMn2O4 reacts with molten salt to form CaMn2O4 after being placed in molten salt for 1 h. The reaction of reducing CaMn2O4 to Mn is divided into two steps: Mn (III)→Mn (II)→Mn. The results of constant voltage deoxidation experiments under different conditions show that the intermediate products of LiMn2O4 reduction to Mn are CaMn2O4, MnO, and (MnO)x(CaO)(1−x). As the reaction progresses, x gradually decreases, and finally the Mn element is completely reduced under the conditions of 3 V for 9 h. The CaO in the product can be removed by washing the sample with deionized water at 0 °C.

1, 1’-Sulfinyldiethylammonium Bis (Hydrogen Sulfate) as a Recyclable Dicationic Ionic Liquid Catalyst for the Efficient Solvent-free Synthesis of 3, 4-Dihydropyrimidin-2(1H)-ones via Biginelli Reaction

2020 ◽  
Vol 23 (2) ◽  
pp. 157-167
Author(s):  
Zainab Ehsani-Nasab ◽  
Ali Ezabadi
Keyword(s):  
Ionic Liquid ◽  
Biginelli Reaction ◽  
Aromatic Aldehydes ◽  
Solvent Free ◽  
Hydrogen Sulfate ◽  
One Pot ◽  
Acidic Ionic Liquid ◽  
Brønsted Acidic Ionic Liquid ◽  
Solvent Free Conditions ◽  
Dicationic Ionic Liquid

Objective: A facile and efficient method for synthesis of 3, 4-dihydropyrimidin-2(1H)-ones via Biginelli reaction catalyzed by a novel dicationic Brönsted acidic ionic liquid, [(EtNH2)2SO][HSO4]2, has been successfully developed. Material and Method:: 3, 4-Dihydropyrimidin-2(1H)-ones were synthesized through one-pot condensation of aromatic aldehydes, ethyl acetoacetate, and urea under solvent-free conditions using [(EtNH2)2SO][HSO4]2 as a novel catalyst. The progress of the reaction was monitored by thin-layer chromatography (ethyl acetate / n-hexane = 1 / 5). The products have been characterized by IR, 1H NMR, 13C NMR, and also by their melting points. Results: In this research, a library of dihydropyrimidinone derivatives was synthesized via Biginelli reaction under solvent-free conditions at 120oC using [(EtNH2)2SO][HSO4]2 as a catalyst. Various aromatic aldehydes, as well as heteroaromatic aldehydes, were employed, affording good to high yields of the corresponding products and illustrating the substrate generality of the present method. In addition, the prepared dicationic Brönsted acidic ionic liquid can be easily recovered and reused. Conclusion: 1, 1’-Sulfinyldiethylammonium bis (hydrogen sulfate), as a novel dicationic ionic liquid, can act as a highly efficient catalyst for the synthesis of 3, 4-dihydropyrimidin-2(1H)-ones under solvent-free conditions.

Electrochemical tools to disclose the electrochemical reduction mechanism of CO2 in aprotic solvents and ionic liquids

2021 ◽  
pp. 115411
Author(s):  
Silvia Mena ◽  
Esteve Ribas ◽  
Clara Richard ◽  
Iluminada Gallardo ◽  
Jordi Faraudo ◽  
...  
Keyword(s):  
Ionic Liquids ◽  
Electrochemical Reduction ◽  
Aprotic Solvents ◽  
Reduction Mechanism

scholarly journals Leaching Chalcopyrite with an Imidazolium-Based Ionic Liquid and Bromide

Metals ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 183 ◽  
Author(s):  
Marcelo Rodríguez ◽  
Luís Ayala ◽  
Pedro Robles ◽  
Rossana Sepúlveda ◽  
David Torres ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Ionic Liquid ◽  
Acid Leaching ◽  
High Thermal Stability ◽  
Complexing Agent ◽  
Hydrogen Sulfate ◽  
Operational Conditions ◽  
Bromide Ions ◽  
Novel Applications ◽  
Ionic Liquid Concentration

The unique properties of ionic liquids (ILs) drive the growing number of novel applications in different industries. The main features of ILs are high thermal stability, recyclability, low flash point, and low vapor pressure. This study investigated pure chalcopyrite dissolution in the presence of the ionic liquid 1-butyl-3-methylimidazolium hydrogen sulfate, [BMIm]HSO4, and a bromide-like complexing agent. The proposed system was compared with acid leaching in sulfate media with the addition of chloride and bromide ions. The results demonstrated that the use of ionic liquid and bromide ions improved the chalcopyrite leaching performance. The best operational conditions were at a temperature of 90 °C, with an ionic liquid concentration of 20% and 100 g/L of bromide.

Direct electrochemical reduction of titanium dioxide in Lewis basic AlCl3–1-butyl-3-methylimidizolium ionic liquid

2011 ◽  
Vol 56 (24) ◽  
pp. 8530-8533 ◽  
Author(s):  
Xiao-Ying Zhang ◽  
Yi-Xin Hua ◽  
Cun-Ying Xu ◽  
Qi-Bo Zhang ◽  
Xiao-Bo Cong ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Titanium Dioxide ◽  
Electrochemical Reduction
Sign in / Sign up

Export Citation Format

Share Document