Facile Fabrication of Silver Dendrites by Different Electrodeposition Methods

Three classical electrochemical techniques such as the pulsed potentiostatic method, cyclic voltammetry, and galvanostatic method were used to study the Ag morphology on glassy carbon disk electrode. The results of the three electrochemical methods were compared and the possible formation mechanism of fractal phenomena was discussed. It was found that cyclic voltammetry, and galvanostatic method are mild, convenient, fast and efficient method to prepare silver fractal structures.

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Solar Exfoliated Graphene Oxide: A Platform for Electrochemical Sensing of Epinephrine

Current Analytical Chemistry ◽

10.2174/1573411015666190104110928 ◽

2020 ◽

Vol 16 (4) ◽

pp. 393-403 ◽

Cited By ~ 1

Author(s):

Renjini Sadhana ◽

Pinky Abraham ◽

Anithakumary Vidyadharan

Keyword(s):

Cyclic Voltammetry ◽

Graphene Oxide ◽

Glassy Carbon Electrode ◽

Glassy Carbon ◽

Simultaneous Detection ◽

Differential Pulse ◽

Carbon Electrode ◽

Modified Glassy Carbon Electrode ◽

Reduced Graphene ◽

Pulse Voltammetry

Introduction: In this study, solar exfoliated graphite oxide modified glassy carbon electrode was used for the anodic oxidation of epinephrine in a phosphate buffer medium at pH7. The modified electrode showed fast response and sensitivity towards Epinephrine Molecule (EP). The electrode was characterized electrochemically through Cyclic Voltammetry (CV) and Differential Pulse Voltammetry (DPV). Area of the electrode enhanced three times during modification and studies reveal that the oxidation process of EP occurs by an adsorption controlled process involving two electrons. The results showed a detection limit of 0.50 ± 0.01μM with a linear range up to 100 μM. The rate constant calculated for the electron transfer reaction is 1.35 s-1. The electrode was effective for simultaneous detection of EP in the presence of Ascorbic Acid (AA) and Uric Acid (UA) with well-resolved signals. The sensitivity, selectivity and stability of the sensor were also confirmed. Methods: Glassy carbon electrode modified by reduced graphene oxide was used for the detection and quantification of epinephrine using cyclic voltammetry and differential pulse voltammetry. Results: The results showed an enhancement in the electrocatalytic oxidation of epinephrine due to the increase in the effective surface area of the modified electrode. The anodic transfer coefficient, detection limit and electron transfer rate constant of the reaction were also calculated. Conclusion: The paper reports the determination of epinephrine using reduced graphene oxide modified glassy carbon electrode through CV and DPV. The sensor exhibited excellent reproducibility and repeatability for the detection of epinephrine and also its simultaneous detection of ascorbic acid and uric acid, which coexist in the biological system.

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Determination of some metals and their mixtures by stripping chronopotentiometry on a glassy carbon rotating disk electrode

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19752961 ◽

1975 ◽

Vol 40 (10) ◽

pp. 2961-2970 ◽

Cited By ~ 5

Author(s):

L. Luong ◽

F. Vydra

Keyword(s):

Glassy Carbon ◽

Rotating Disk ◽

Rotating Disk Electrode ◽

Disk Electrode ◽

Stripping Chronopotentiometry

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On the electroreduction mechanism of halobenzenes: Detection of intermediates in reduction of monohalobenzenes

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc19890900 ◽

1989 ◽

Vol 54 (4) ◽

pp. 900-910 ◽

Cited By ~ 2

Author(s):

Juan Casado ◽

Iluminada Gallardo

Keyword(s):

Cyclic Voltammetry ◽

Electrochemical Behaviour ◽

Experimental Results ◽

Disk Electrode ◽

Rotating Ring Disk Electrode ◽

Mercury Cathode

Experimental results from electrochemical behaviour of halobenzenes in DMF at a mercury cathode are used to discuss alternative mechanisms of reduction. Intermediates of these mechanisms, such as phenyl anion, phenylmercury radical and phenylmercury cation have been detected at the electrode by using cyclic voltammetry and a rotating ring-disk electrode.

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SIMULTANEOUS VOLTAMMETRIC DETERMINATION OF p-AMINOPHENOL AND PARACETAMOL USING ACTIVATED GLASSY CARBON ELECTRODE: CYCLIC VOLTAMMETRY AND DIFFERENTIAL PULSE VOLTAMMETRY STUDY

Acta Chemica Iasi ◽

10.2478/achi-2020-0010 ◽

2020 ◽

Vol 28 (2) ◽

pp. 146-162

Author(s):

Teklu Tikuye ◽

Tilahun Yai Feyisa ◽

Shimeles Addisu Kitte ◽

Gebru Gebretsadik ◽

Dereje Yenealem

Keyword(s):

Cyclic Voltammetry ◽

Differential Pulse Voltammetry ◽

Glassy Carbon Electrode ◽

Glassy Carbon ◽

Differential Pulse ◽

Voltammetric Determination ◽

Carbon Electrode ◽

Pulse Voltammetry ◽

Simultaneous Voltammetric Determination

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ChemInform Abstract: KINETIC BEHAVIOR OF THE TIN(IV)-TIN(II) COUPLE IN ACIDIFIED CONCENTRATED BROMIDE SOLUTIONS AT A GLASSY CARBON ROTATING RING-DISK ELECTRODE

Chemischer Informationsdienst ◽

10.1002/chin.198231021 ◽

1982 ◽

Vol 13 (31) ◽

Author(s):

P. KIEKENS ◽

H. VERPLAETSE ◽

H. DONCHE ◽

E. TEMMERMAN

Keyword(s):

Glassy Carbon ◽

Kinetic Behavior ◽

Disk Electrode ◽

Rotating Ring Disk Electrode ◽

Bromide Solutions

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Electrochemical Trifluoromethylation of Isonicotinic acid hydrazide using Cyclic Voltammetry and Galvanostatic Electrolysis

Oriental Journal Of Chemistry ◽

10.13005/ojc/3404050 ◽

2018 ◽

Vol 34 (4) ◽

pp. 2098-2105

Author(s):

Raja Beryl J ◽

Joseph Raj Xavier

Keyword(s):

Cyclic Voltammetry ◽

Glassy Carbon ◽

Current Density ◽

Platinum Electrode ◽

Isonicotinic Acid ◽

Acid Hydrazide ◽

Isonicotinic Acid Hydrazide ◽

Glassy Carbon Electrodes ◽

Galvanostatic Electrolysis ◽

Sodium Trifluoroacetate

Trifluoromethylation of isonicotinic acid hydrazide has been investigated in trifluoroacetic acid containing pyridine, triethylamine and sodium trifluoroacetate dissolved in acetonitrile on platinum and glassy carbon electrodes using cyclic voltammetry. LSVs for isonicotinic acid hydrazide in 0.1 M TFA/ Py/TEA/NaTFA in acetonitrile on platinum electrode show that there is no distinct oxidation peak for the oxidation of isonicotinicacid hydrazide within the voltammetric region of 0.0 to 1.6 V vs Ag and it gets oxidized anodically in the gas evolution region itself. TFA/ NaTFA medium shows slightly higher current density than the other two media for the oxidation of isonicotinic acid hydrazide. CVs for different concentrations of isonicotinic acid hydrazide show that anodic peak becomes broad and flat. It shows that severe adsorption of INAH/product takes place on the glassy carbon electrode during the voltammetry scanning. Galvanostatic electrolysis of INAH in TFA/Py/ACN medium at low current density on Pt shows good conversion with low selectivity.

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Electrocatalytic Study of Paracetamol at a Single-Walled Carbon Nanotube/Nickel Nanocomposite Modified Glassy Carbon Electrode

Advances in Materials Science and Engineering ◽

10.1155/2015/742548 ◽

2015 ◽

Vol 2015 ◽

pp. 1-8 ◽

Cited By ~ 7

Author(s):

Koh Sing Ngai ◽

Wee Tee Tan ◽

Zulkarnain Zainal ◽

Ruzniza Mohd Zawawi ◽

Joon Ching Juan

Keyword(s):

Cyclic Voltammetry ◽

Carbon Nanotube ◽

Glassy Carbon Electrode ◽

Modified Electrode ◽

Glassy Carbon ◽

Carbon Electrode ◽

Single Walled Carbon Nanotube ◽

Paracetamol Concentration ◽

Single Walled Carbon

A rapid, simple, and sensitive method for the electrochemical determination of paracetamol was developed. A single-walled carbon nanotube/nickel (SWCNT/Ni) nanocomposite was prepared and immobilized on a glassy carbon electrode (GCE) surface via mechanical attachment. This paper reports the voltammetry study on the effect of paracetamol concentration, scan rate, pH, and temperature at a SWCNT/Ni-modified electrode in the determination of paracetamol. The characterization of the SWCNT/Ni/GCE was performed by cyclic voltammetry. Variable pressure scanning electron microscopy (VPSEM) and energy dispersive X-ray (EDX) spectrometer were used to examine the surface morphology and elemental profile of the modified electrode, respectively. Cyclic voltammetry showed significant enhancement in peak current for the determination of paracetamol at the SWCNT/Ni-modified electrode. A linear calibration curve was obtained for the paracetamol concentration between 0.05 and 0.50 mM. The SWCNT/Ni/GCE displayed a sensitivity of 64 mA M−1and a detection limit of 1.17 × 10−7 M in paracetamol detection. The proposed electrode can be applied for the determination of paracetamol in real pharmaceutical samples with satisfactory performance. Results indicate that electrodes modified with SWCNT and nickel nanoparticles exhibit better electrocatalytic activity towards paracetamol.

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Synthesis and Electrochemical Reduction of Methyl 3-Halo-1-benzothiophene-2-carboxylates

Collection of Czechoslovak Chemical Communications ◽

10.1135/cccc20040242 ◽

2004 ◽

Vol 69 (1) ◽

pp. 242-260 ◽

Cited By ~ 5

Author(s):

Michal Rejňák ◽

Jiří Klíma ◽

Jiří Svoboda ◽

Jiří Ludvík

Keyword(s):

Cyclic Voltammetry ◽

Radical Anion ◽

Preparative Method ◽

Platinum Electrodes ◽

Disk Electrode ◽

Dimer Formation ◽

Halide Anion ◽

Primary Radical ◽

Heterocyclic Radical ◽

Ece Mechanism

A preparative method of synthesis of the new methyl 3-iodo-1-benzothiophene-2-carboxylate was elaborated. Electrochemical behavior of methyl 3-chloro-, bromo- and iodo-1-benzothiophene-2-carboxylates 1-3, and of their reduction and dimer products 4, 5 in anhydrous dimethylformamide has been investigated at mercury and platinum electrodes using polarography, cyclic voltammetry and voltammetry on a rotating platinum disk electrode. The reduction in divided cells follows the ECE mechanism (electron - chemical step - electron), where the primary radical anion is split into a halide anion and neutral heterocyclic radical, which is immediately reduced by the second electron and protonated. The only reduction product is the methyl 1-benzothiophene-2-carboxylate (5); whereas the EDim mechanism (electron - dimer formation) leading to the dimeric species 4 was not observed under the above conditions. Reduction of 1-3 on platinum causes formation of a blocking film on the electrode. Sonication during electrolysis successfully reactivates the electrode.

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