Potential dependent capacitance of [EMIM][TFSI], [N1114][TFSI] and [PYR13][TFSI] ionic liquids on glassy carbon

2019 ◽  
Vol 21 (7) ◽  
pp. 3712-3720 ◽  
Author(s):  
Jeffrey M. Klein ◽  
Evio Panichi ◽  
Burcu Gurkan
Keyword(s):  
Ionic Liquids ◽  
Glassy Carbon ◽  
Potential Range

Potential dependent capacitance of [N1114][TFSI] suggests the crowding mechanism at the wings of the potential range and overscreening near PZC.

scholarly journals Analysis of the Overlapped Electrochemical Signals of Hydrochlorothiazide and Pyridoxine on the Ethylenediamine-Modified Glassy Carbon Electrode by Use of Chemometrics Methods

Molecules ◽  
2019 ◽  
Vol 24 (14) ◽  
pp. 2536 ◽  
Author(s):  
Yue Zhang ◽  
Yan Zhou ◽  
Shujun Chen ◽  
Yashi You ◽  
Ping Qiu ◽  
...  
Keyword(s):  
Least Squares ◽  
Glassy Carbon Electrode ◽  
Glassy Carbon ◽  
Principal Component ◽  
Potential Range ◽  
Carbon Electrode ◽  
Separation And Purification ◽  
Modified Glassy Carbon Electrode ◽  
Buffer Solution ◽  
Experimental Conditions

In this work, the electrochemical behavior of hydrochlorothiazide and pyridoxine on the ethylenediamine-modified glassy carbon electrode were investigated by differential pulse voltammetry. In pH 3.4 Britton-Robinson (B-R) buffer solution, both hydrochlorothiazide and pyridoxine had a pair of sensitive irreversible oxidation peaks, that overlapped in the 1.10 V to 1.20 V potential range. Under the optimum experimental conditions, the peak current was linearly related to hydrochlorothiazide and pyridoxine in the concentration range of 0.10–2.0 μg/mL and 0.02–0.40 μg/mL, respectively. Chemometrics methods, including classical least squares (CLS), principal component regression (PCR) and partial least squares (PLS), were introduced to resolve the overlapped signals and determine the two components in mixtures, which avoided the troublesome steps of separation and purification. Finally, the simultaneous determination of the two components in commercial pharmaceuticals was performed with satisfactory results.

Recovery of fission palladium by electrodeposition using room temperature ionic liquids

2006 ◽  
Vol 94 (3) ◽  
Author(s):  
P. Giridhar ◽  
K. A. Venkatesan ◽  
B. P. Reddy ◽  
T. G. Srinivasan ◽  
P. R. Vasudeva Rao
Keyword(s):  
Cyclic Voltammetry ◽  
Ionic Liquids ◽  
Nuclear Fuel ◽  
Glassy Carbon ◽  
Molten Salts ◽  
Room Temperature ◽  
Room Temperature Ionic Liquids ◽  
Redox Behavior ◽  
Working Electrode ◽  
Irradiated Nuclear Fuel

SummaryRoom temperature molten salts for possible application of recovery of fission palladium from irradiated nuclear fuel/wastes have been investigated. The redox behavior of a solution of palladium(II) chloride and 1-butyl-3-methylimidazolium chloride (bmimCl) at glassy carbon working electrode has been studied at various temperatures using cyclic voltammetry. The voltammogram of bmimCl-PdCl

Differential Capacity of the Double-Layer Formed at a Solid Electrode (Pt, Au)/Ionic Liquid Interface

2007 ◽  
Vol 62 (3-4) ◽  
pp. 187-190 ◽  
Author(s):  
Andrzej Lewandowski ◽  
Maciej Galiński ◽  
Sebastian R. Krajewski
Keyword(s):  
Ionic Liquid ◽  
Ionic Liquids ◽  
Double Layer ◽  
Electrode System ◽  
Liquid Interface ◽  
Potential Range ◽  
Differential Capacity ◽  
Impedance Measurements ◽  
Solid Electrode ◽  
Double Layer Capacity

The differential capacity at the electrode (Pt, Au)/ionic liquid interface of 18 ionic liquids (ILs), was measured applying chronoamperometry. The measurements were done by a two electrode system. The double layer capacity at the Pt/IL and Au/IL interface was 1 - 8 μF/cm2. The capacity, estimated from the impedance measurements, was approximately constant within a potential range of ca. 3 V.

Capacitance Measurements in a Series of Room-Temperature Ionic Liquids at Glassy Carbon and Gold Electrode Interfaces

2008 ◽  
Vol 112 (42) ◽  
pp. 16600-16608 ◽  
Author(s):  
Muhammad Tanzirul Alam ◽  
Md. Mominul Islam ◽  
Takeyoshi Okajima ◽  
Takeo Ohsaka
Keyword(s):  
Ionic Liquids ◽  
Glassy Carbon ◽  
Gold Electrode ◽  
Room Temperature ◽  
Room Temperature Ionic Liquids ◽  
Capacitance Measurements

scholarly journals Electrochemical Reduction of Oxygen on Anthraquinone/Carbon Nanotubes Nanohybrid Modified Glassy Carbon Electrode in Neutral Medium

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Zheng Gong ◽  
Guoquan Zhang ◽  
Song Wang
Keyword(s):  
Carbon Nanotubes ◽  
Electron Microscope ◽  
Glassy Carbon ◽  
Multiwall Carbon Nanotubes ◽  
Rotating Disk ◽  
Reduction Reaction ◽  
Rotating Disk Electrode ◽  
Neutral Medium ◽  
Potential Range ◽  
Buffer Solution

The electrochemical behaviors of monohydroxy-anthraquinone/multiwall carbon nanotubes (MHAQ/MWCNTs) nanohybrid modified glassy carbon (MHAQ/MWCNTs/GC) electrodes in neutral medium were investigated; also reported was their application in the electrocatalysis of oxygen reduction reaction (ORR). The resulting MHAQ/MWCNTs nanohybrid was characterized by scanning electron microscope (SEM) and transmission electron microscope (TEM). It was found that the ORR at the MHAQ/MWCNTs/GC electrode occurs irreversibly at a potential about 214 mV less negative than at a bare GC electrode in pH 7.0 buffer solution. Cyclic voltammetric and rotating disk electrode (RDE) techniques indicated that the MHAQ/MWCNTs nanohybrid has high electrocatalytic activity for the two-electron reduction of oxygen in the studied potential range. The kinetic parameters of ORR at the MHAQ/MWCNTs nanohybrid modified GC electrode were also determined by RDE and EIS techniques.

Unusual electrochemical behaviour of AuBr4− in ionic liquids. Towards a simple recovery of gold(iii) after extraction into an ionic liquid

RSC Advances ◽  
2014 ◽  
Vol 4 (103) ◽  
pp. 58910-58915 ◽  
Author(s):  
Nicolas Papaiconomou ◽  
Nicolas Glandut ◽  
Isabelle Billard ◽  
Eric Chainet
Keyword(s):  
Cyclic Voltammetry ◽  
Ionic Liquid ◽  
Ionic Liquids ◽  
Glassy Carbon ◽  
Electrochemical Behaviour ◽  
Linear Voltammetry

The electrochemistry of AuBr4− complexes extracted into ionic liquids [C8PYR][NTf2] or [C8MIM][NTf2] saturated with water and gas has been studied by cyclic voltammetry on a glassy carbon macro electrode and by linear voltammetry on a platinum microelectrode.

Electrocatalytic Oxidation of Oxalic Acid Using a Multielectrolytic Modified Glassy Carbon Electrodes

2015 ◽  
Vol 833 ◽  
pp. 35-38
Author(s):  
Syuhei Akabe ◽  
Koichi Asaka ◽  
Takuto Takahashi ◽  
Tsubasa Kitamura ◽  
Hiroaki Matsuura ◽  
...  
Keyword(s):  
Oxalic Acid ◽  
Functional Groups ◽  
Glassy Carbon Electrode ◽  
Glassy Carbon ◽  
Acidic Medium ◽  
Electrocatalytic Oxidation ◽  
Acid Oxidation ◽  
Potential Range ◽  
Carbon Electrode ◽  
Oxidation Wave

Electrocatalytic oxidation activity of oxalic acid can be observed by using a multielectrolytic modified glassy carbon electrode (MMGCE). The MMGCE was fabricated by using the following electrolytic-oxidation/reduction processes. First, the functional groups containing nitrogen atoms such as amino group are introduced by the electrode oxidation of a bare glassy carbon electrode in an ammonium carbamate aqueous solution, and next, this electrode was electroreduced in sulfuric acid, and it was found that the reduction current gradually increased as the electrolysis time increased. This suggests that functional groups containing nitrogen atoms contributing the catalytic electron transfer of hydrogen ion are introduced. To observe the electrode oxidation wave of oxalic acid, the voltammmetric measurements of oxalic acid was carried out by using MMGCE in an acidic medium. The oxidation wave of oxalic acid at low potential range was appeared in the linear sweep voltammograms. The MMGCE exhibited well-defined peak of oxalic acid oxidation in acidic medium.

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