The reduction of HCl dissolved in LiCl-KCl eutectic

1975 ◽  
Vol 28 (5) ◽  
pp. 965 ◽  
Author(s):  
NQ Minh ◽  
BJ Welch
Keyword(s):  
Molten Salts ◽  
Platinum Electrode ◽  
Linear Sweep Voltammetry ◽  
Reduction Reaction ◽  
Linear Sweep ◽  
Soluble Product ◽  
Electron Transfer Process ◽  
Small Ionic Radius ◽  
Molten Salt System ◽  
Good Agreement

The cathodic reduction of hydrogen chloride dissolved in LiCl-KCl eutectic has been studied by both chronopotentiometry and linear sweep voltammetry using a platinum electrode. The reduction reaction has been found to proceed by a reversible one-electron transfer process forming a soluble product. ��� Diffusion coefficients calculated from solubility measurements and the electrochemical studies are considerably higher (e.g. 2.1 x 10-4 cm2 s-1 at 793 K) than most other solutes in molten salts but in good agreement with results from a less detailed study. The high value is probably due to the small ionic radius of the proton as compared to other ions in the lattice of the molten salt system.

Electron Transfer in Electro-Oxidation of Amoxicillin Using Platinum Electrode and Platinum Modified Cobalt Electrodes

2021 ◽  
Vol 874 ◽  
pp. 155-164
Author(s):  
Herlina ◽  
Muhammad Ali Zulfikar ◽  
Buchari
Keyword(s):  
Electron Transfer ◽  
Oxidation Process ◽  
Platinum Electrode ◽  
Linear Sweep Voltammetry ◽  
Pharmaceutical Product ◽  
Electrochemical Methods ◽  
Linear Sweep ◽  
Low Concentrations ◽  
Electro Oxidation ◽  
Continuous Use

Recently, the increased use of antibiotics in the environment has been studied and one of them is amoxicillin. Amoxicillin (AMX) is a pharmaceutical product that can become waste due to the continuous use and released into the ecosystem even at low concentrations. The electro-oxidation process is one of the electrochemical methods used to destruct the existence of antibiotics because the process is relatively fast and inexpensive. Platinum electrode and platinum modified cobalt electrodes are used for amoxicillin electro-oxidation at the pH of 2 - 7. The range of this amoxicillin's pH was achieved by the pKa's values of the amoxicillin and measured using a UV/Vis spectrophotometer. Electron transfer during the amoxicillin electro-oxidation process with these electrodes is measured by linear sweep voltammetry. The results obtained during the electro-oxidation process showed that electron transfer of amoxicillin was 1, with a Nernstian factor of 0.0521 V/pH for platinum electrode and platinum modified cobalt electrodes, Pt/Co(OH)2 and Pt/Co respectively with values of 0.0506 V/pH and 0.0673 V/pH.

scholarly journals Biohybrid Cathode in Single Chamber Microbial Fuel Cell

Nanomaterials ◽  
2018 ◽  
Vol 9 (1) ◽  
pp. 36 ◽  
Author(s):  
Giulia Massaglia ◽  
Isabella Fiorello ◽  
Adriano Sacco ◽  
Valentina Margaria ◽  
Candido Pirri ◽  
...  
Keyword(s):  
Electrochemical Impedance Spectroscopy ◽  
Fuel Cell ◽  
Microbial Fuel Cells ◽  
Electrochemical Impedance ◽  
Linear Sweep Voltammetry ◽  
Power Production ◽  
Reduction Reaction ◽  
Linear Sweep ◽  
Single Chamber ◽  
Carbon Based

The aim of this work is to investigate the properties of biofilms, spontaneously grown on cathode electrodes of single-chamber microbial fuel cells, when used as catalysts for oxygen reduction reaction (ORR). To this purpose, a comparison between two sets of different carbon-based cathode electrodes is carried out. The first one (Pt-based biocathode) is based on the proliferation of the biofilm onto a Pt/C layer, leading thus to the creation of a biohybrid catalyst. The second set of electrodes (Pt-free biocathode) is based on a bare carbon-based material, on which biofilm grows and acts as the sole catalyst for ORR. Linear sweep voltammetry (LSV) characterization confirmed better performance when the biofilm is formed on both Pt-based and Pt-free cathodes, with respect to that obtained by biofilm-free cathodes. To analyze the properties of spontaneously grown cathodic biofilms on carbon-based electrodes, electrochemical impedance spectroscopy is employed. This study demonstrates that the highest power production is reached when aerobic biofilm acts as a catalyst for ORR in synergy with Pt in the biohybrid cathode.

Studies of the kinetics of aluminium incorporation into an iron electrode in molten salts by linear sweep voltammetry

1989 ◽  
Vol 19 (2) ◽  
pp. 271-274 ◽  
Author(s):  
F. Lantelme ◽  
E. Cherrat ◽  
Y. Chryssoulakis ◽  
S. Kalogeropoulou
Keyword(s):  
Molten Salts ◽  
Linear Sweep Voltammetry ◽  
Iron Electrode ◽  
Linear Sweep ◽  
Kinetics Of

Synthesis of Nanostructured PdMo Electrocatalysts for Oxygen Reduction Reaction in Fuel Cells

2013 ◽  
Vol 785-786 ◽  
pp. 390-394 ◽  
Author(s):  
Chong Jiang Cao ◽  
Xiao Geng Liu ◽  
Qin Liu
Keyword(s):  
Oxygen Reduction ◽  
Bimetallic Catalysts ◽  
Bimetallic Nanoparticles ◽  
Linear Sweep Voltammetry ◽  
Carbon Support ◽  
Reduction Reaction ◽  
Linear Sweep ◽  
Strong Electrostatic Adsorption ◽  
Good Catalytic Activity ◽  
Supported Pd

Carbon black supported Pd-Mo bimetallical nanoparticles are prepared by Strong Electrostatic Adsorption (SEA) method. A series of Pd-Mo catalysts were prepared by selective deposition of the [Pd (NH3)4]+2cationion onto the supported MoO3phase. The prepared materials are characterized by N2-BET, powder XRD and STEM. The results showed that good dispersion of bimetallic nanoparticles on the carbon support is observed from STEM images. Oxygen reduction measurements performed by linear sweep voltammetry indicat the good catalytic activity of Pd-Mo by SEA compared to dry impregnation (DI) bimetallic catalysts since the SEA technique produced more well dispersed and intimately designed bimetallic particles after reduction.

scholarly journals Electrochemical Determination of Trichloroacetic Acid using Platinum Electrode

2013 ◽  
Vol 9 (2) ◽  
pp. 1933-1942
Author(s):  
M. Khodari ◽  
A. A. Abd-Elrady ◽  
E.M. Rabie ◽  
H.F. Assaf
Keyword(s):  
Trichloroacetic Acid ◽  
Platinum Electrode ◽  
Supporting Electrolyte ◽  
Linear Sweep Voltammetry ◽  
Electrochemical Determination ◽  
Linear Sweep ◽  
Solution Ph ◽  
Optimized Conditions ◽  
Analytical Utility

The electrochemical reduction of Trichloroacetic acid (TCA) on a platinum electrode by cyclic and linear sweep voltammetry was described. The measurements were investigated under optimized conditions. The supporting electrolyte was 0.01 M sodiumnitrate solution (pH 6.0), scan rate 50mV\s and the reached detection and quantification limits was 4x10-6 mol l-1. The obtained result indicated linear increasing of the current with concentration of TCAA between lower and upper detection limits and excellent sensitivity towards TCAA reduction, which demonstrates the analytical utility of platinum electrode. Meanwhile, interference from other ions and substances were examined. The experimental results indicate that the method for the determination of TCAA samples is successful comparing with other methods or techniques.

scholarly journals Electrochemical Studies of o- and p- Anisidine

2015 ◽  
Vol 3 (2) ◽  
pp. 267-271
Author(s):  
Richa Sharma ◽  
Sushma Dave
Keyword(s):  
Cyclic Voltammetry ◽  
Electrochemical Oxidation ◽  
Platinum Electrode ◽  
Linear Sweep Voltammetry ◽  
Electrochemical Studies ◽  
Oxidation Peak ◽  
Cathodic Peak ◽  
Linear Sweep ◽  
And Diffusion ◽  
Sensitive Method

Electrochemical oxidation of methyl substituted aniline (anisidine) has been done on both gold and platinum electrode using cyclic voltammetry. The results were compared in different supporting electrolytes such as KCl, KNO3, H2SO4, HCl. Effect of pH was observed on electrochemical oxidation of o- & p- anisidine at gold and platinum electrode. During various scan single oxidation peak during first forward scan with no corresponding cathodic peak was obtained while a new anodic cathodic couple peak appears in subsequent scan obtained. Kinetic parameters like heterogeneous rate constant, transfer co-efficient and diffusion co-efficient were also calculated. A sensitive method was developed for estimation of micro quantities of anisidine by linear sweep voltammetry and hydrodynamic voltammetry.Int J Appl Sci Biotechnol, Vol 3(2): 267-271 DOI: http://dx.doi.org/10.3126/ijasbt.v3i2.12615 

scholarly journals Electrochemical Deposition of Al-Ti Alloys from Equimolar AlCl3 + NaCl Containing Electrochemically Dissolved Titanium

Metals ◽  
2020 ◽  
Vol 10 (1) ◽  
pp. 88
Author(s):  
Vesna S. Cvetković ◽  
Nataša M. Vukićević ◽  
Ksenija Milićević-Neumann ◽  
Srećko Stopić ◽  
Bernd Friedrich ◽  
...  
Keyword(s):  
Electrochemical Deposition ◽  
Glassy Carbon ◽  
Molten Salts ◽  
Energy Dispersive Spectrometry ◽  
Linear Sweep Voltammetry ◽  
Carbon Electrode ◽  
Ti Alloy ◽  
Linear Sweep ◽  
Ti Alloys ◽  
Constant Potential

Al-Ti alloys were electrodeposited from equimolar chloroaluminate molten salts containing up to 0.1 M of titanium ions, which were added to the electrolyte by potentiostatic dissolution of metallic Ti. Titanium dissolution and titanium and aluminium deposition were investigated by linear sweep voltammetry and chronoamperometry at 200 and 300 °C. Working electrodes used were titanium and glassy carbon. The voltammograms on Ti obtained in the electrolyte without added Ti ions indicated titanium deposition and dissolution proceeding in three reversible steps: Ti4+ ⇄ Ti3+, Ti3+ ⇄ Ti2+ and Ti2+ ⇄ Ti. The voltammograms recorded with glassy carbon in the electrolyte containing added titanium ions did not always clearly register all of the three processes. However, peak currents, which were characteristics of Al, Ti and Al-Ti alloy deposition and dissolution, were evident in voltammograms on both working electrodes used. A constant potential electrodeposition regime was used to obtain deposits on the glassy carbon working electrode. The obtained deposits were characterized by SEM, energy-dispersive spectrometry and XRD. In the deposits on the glassy carbon electrode, the analysis identified an Al and AlTi3 alloy formed at 200 °C and an Al2Ti and Al3Ti alloy obtained at 300 °C.

Effect of cetyltrimethylammonium bromide on the electrochemiluminiscence and electrooxidation of luminol

1983 ◽  
Vol 48 (2) ◽  
pp. 477-483 ◽  
Author(s):  
Jan Lasovský ◽  
František Grambal
Keyword(s):  
Cetyltrimethylammonium Bromide ◽  
Linear Sweep Voltammetry ◽  
Critical Micellar Concentration ◽  
Peak Height ◽  
Anodic Peak ◽  
Alkaline Solutions ◽  
Platinum Electrodes ◽  
Micellar Solutions ◽  
Linear Sweep ◽  
Low Concentrations

The electrooxidation of luminol in alkaline solutions in the presence of cetyltrimethylammonium bromide (I) was studied by linear sweep voltammetry on fixed and vibrating platinum electrodes. The presence of I in low concentrations (below the critical micellar concentration) brings about aggregation of the luminol, which is manifested by an increase in the anodic peak height and its shift towards lower potentials. In micellar solutions the peak height decreases owing to the slower diffusion of the bulkier micelles, the shift to lower potentials being preserved. The light-voltage curves correspond with the voltammetric curves, exhibiting identical shifts of the peak potentials in dependence on the concentration of the surfactant.

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