Pd Nanoparticle Formation during Constant Potential Electrodepositions in Ionic Liquids

2016 ◽  
Vol 75 (15) ◽  
pp. 649-655
Author(s):  
S. Shrestha ◽  
M. Nagib ◽  
E. J. Biddinger
Keyword(s):  
Ionic Liquids ◽  
Nanoparticle Formation ◽  
Pd Nanoparticle ◽  
Constant Potential

scholarly journals Electroless and Electrodeposition of Silver from a Choline Chloride-Based Ionic Liquid

2015 ◽  
Vol 58 (2) ◽  
pp. 66-73
Author(s):  
Muhammad Rostom Ali ◽  
Muhammad Ziaur Rahman ◽  
Siddhartha Sankar Saha
Keyword(s):  
Ionic Liquids ◽  
Room Temperature ◽  
Choline Chloride ◽  
Dip Coating ◽  
Constant Current ◽  
Electrolytic Deposition ◽  
Cathodic Current ◽  
Experimental Conditions ◽  
Constant Potential ◽  
Potential Methods

The electroless and electrolytic deposition of silver from a solution containing silver nitrate in either an ethylene glycol (EG)-choline chloride based or a urea-choline chloride based ionic liquids has been carried out onto steel and copper cathodes by simple immersion, constant current and constant potential methods at room temperature. It has been found that electroless silver deposits of up to several micronshave been obtained by dip coating from both urea and EG based ionic liquids without the use of catalysts. The influences of various experimental conditions on electrodeposition and morphology of the deposited layers have been investigated by scanning electron microscopy (SEM) and X-ray diffraction (XRD). It has been observed that crack free bright metallic coloured silver coatings can be obtained from both EG and urea based ionic liquids at the applied deposition potentials up to -0.40 V and applied deposition current densities up to -5.0 A m-2 at room temperature. The cathodic current efficiency for the deposition of Ag is about 99%.

Electrochemistry of Neodymium in Phosphonium Ionic Liquids: The Influence of Cation, Water Content, and Mixed Anions

2020 ◽  
Vol 73 (11) ◽  
pp. 1080
Author(s):  
Laura Sanchez-Cupido ◽  
Jennifer M. Pringle ◽  
Amal Siriwardana ◽  
Cristina Pozo-Gonzalo ◽  
Maria Forsyth
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Electrochemical Behaviour ◽  
Critical Metals ◽  
Deposition Mechanism ◽  
Reduction Processes ◽  
Constant Potential ◽  
Current Densities ◽  
Environmentally Friendly Approach ◽  
Phosphonium Ionic Liquids

Electrodeposition using ionic liquids has emerged as an environmentally friendly approach to recover critical metals, such a neodymium. The investigation of ionic liquid chemistries and compositions is an important part of the move towards efficient neodymium recovery from end-of-life products that needs further research. Thus, in this paper we have investigated a series of phosphonium ionic liquids as potential electrolytic media. Anions such as bis(trifluoromethylsulfonyl)imide (TFSI), dicyanamide (DCA), and triflate (TfO) have been investigated, in combination with short- and long-alkyl-chain phosphonium cations. The work here suggests that [TFSI]– is one of the most promising anions for successful deposition of Nd and that water plays an important role. In contrast, electrochemical behaviour was significantly hindered in the case of DCA ionic liquid, most likely owing to strong coordination between [DCA]– and Nd3+. Mixtures of anions, [TfO]– and [TFSI]–, have also been investigated in this work, resulting in two reduction processes that could be related to a different deposition mechanism involving two steps, as observed in the case of dysprosium or, alternatively, different coordination environments that have distinct deposition potentials. Additionally, we investigated the influence of electrode substrates – glassy carbon and copper. Cu electrodes resulted in the largest current densities and thus were used for subsequent electrodeposition at constant potential. These findings are valuable for optimising the deposition of Nd in order to develop more efficient and inexpensive recycling technologies for rare earth metals.

Pd nanoparticle catalysed one-pot sequential Heck and Suzuki couplings of bromo-chloroarenes in ionic liquids and water

2012 ◽  
Vol 10 (4) ◽  
pp. 808-813 ◽  
Author(s):  
Pietro Cotugno ◽  
Antonio Monopoli ◽  
Francesco Ciminale ◽  
Nicola Cioffi ◽  
Angelo Nacci
Keyword(s):  
Ionic Liquids ◽  
One Pot ◽  
Pd Nanoparticle

scholarly journals Simulation of a Solvate Ionic Liquid at a Polarisable Electrode with a Constant Potential

2018 ◽  
Author(s):  
Samuel W. Coles ◽  
Vladislav Ivanistsev
Keyword(s):  
Boundary Condition ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Surface Charge ◽  
Computational Studies ◽  
Lithium Ions ◽  
Liquid Electrode ◽  
Constant Potential ◽  
Electrode Interface ◽  
Insight Into

<div>In this article we discuss the nanostructure and calculated the capacitance of a solvate ionic liquid–electrode interfaces, where the electrode has a constant potential, and is thus inherently polarisable. Lithium ions from the lithium</div><div>glyme solvate ionic liquid are found within 0.5 nm of the electrode at all voltages studied, however, their solvation environment varies with voltage. Our study provides molecular insight into the electrode interface of solvate ionic liquids, with many features similar to pure ionic liquids. A comparison with previous studies of the same electrolyte using the fixed surface charge boundary condition is also illuminating, informing future computational studies of electrolyte–electrode interfaces.</div>

scholarly journals Investigation of the Ionic Liquid Graphene Electric Double Layer in Supercapacitors Using Constant Potential Simulations

Nanomaterials ◽  
2020 ◽  
Vol 10 (11) ◽  
pp. 2181
Author(s):  
Baris Demir ◽  
Debra Searles
Keyword(s):  
Molecular Dynamics ◽  
Ionic Liquids ◽  
Double Layer ◽  
Electric Double Layer ◽  
Potential Method ◽  
Bulk Region ◽  
Structure And Dynamics ◽  
Constant Potential ◽  
Dynamics Simulations ◽  
O 10

In this work, we investigate the effect of the cation structure on the structure and dynamics of the electrode–electrolyte interface using molecular dynamics simulations. A constant potential method is used to capture the behaviour of 1-ethyl-3-methylimidazolium bis (trifluoromethane)sulfonimide ([C2mim][NTf2]) and butyltrimethylammonium bis(trifluoromethane) sulfonimide ([N4,1,1,1][NTf2]) ionic liquids at varying potential differences applied across the supercapacitor. We find that the details of the structure in the electric double layer and the dynamics differ significantly, yet the charge profile and capacitance do not vary greatly. For the systems considered, charging results in the rearrangement and reorientation of ions within ∼1 nm of the electrode rather than the diffusion of ions to/from the bulk region. This occurs on timescales of O(10 ns) for the ionic liquids considered, and depends on the viscosity of the fluid.

Cobalt(ii) containing liquid metal salts for electrodeposition of cobalt and electrochemical nanoparticle formation

2017 ◽  
Vol 46 (38) ◽  
pp. 12845-12855 ◽  
Author(s):  
Jeroen Sniekers ◽  
Pieter Geysens ◽  
João C. Malaquías ◽  
Tom Vander Hoogerstraete ◽  
Luc Van Meervelt ◽  
...  
Keyword(s):  
Thin Films ◽  
Ionic Liquids ◽  
Liquid Metal ◽  
Cobalt Nanoparticles ◽  
Metal Salts ◽  
Nanoparticle Formation ◽  
Cobalt Thin Films

Cobalt(ii) containing ionic liquids were used as electrolytes for the electrodeposition of cobalt thin films and cobalt nanoparticles.

Pd Nanoparticle Formation in Ionic Liquid Thin Films Monitored by in situ Vibrational Spectroscopy

Langmuir ◽  
2015 ◽  
Vol 31 (44) ◽  
pp. 12126-12139 ◽  
Author(s):  
Sascha Mehl ◽  
Arafat Toghan ◽  
Tanja Bauer ◽  
Olaf Brummel ◽  
Nicola Taccardi ◽  
...  
Keyword(s):  
Thin Films ◽  
Ionic Liquid ◽  
Vibrational Spectroscopy ◽  
Nanoparticle Formation ◽  
Pd Nanoparticle ◽  
Liquid Thin Films
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