scholarly journals Simulating Linear Sweep Voltammetry from First-Principles: Application to Electrochemical Oxidation of Water on Pt(111) and Pt3Ni(111)

2012 ◽  
Vol 116 (7) ◽  
pp. 4698-4704 ◽  
Author(s):  
Venkatasubramanian Viswanathan ◽  
Heine Anton Hansen ◽  
Jan Rossmeisl ◽  
Thomas Francisco Jaramillo ◽  
Heinz Pitsch ◽  
...  
Keyword(s):  
Electrochemical Oxidation ◽  
First Principles ◽  
Linear Sweep Voltammetry ◽  
Linear Sweep

Distillery Wastewater Treated by Electrochemical Oxidation with Boron-Doped Diamond Electrodes

2011 ◽  
Vol 14 (2) ◽  
Author(s):  
Christian E. Alvarez-Pugliese ◽  
Paola Moreno-Wiedman ◽  
Fiderman Machuca-Martínez ◽  
Nilson Marriaga-Cabrales
Keyword(s):  
Electrochemical Oxidation ◽  
Linear Sweep Voltammetry ◽  
Direct Oxidation ◽  
Linear Sweep ◽  
Diamond Electrodes ◽  
Boron Doped Diamond ◽  
Boron Doped ◽  
Distillery Wastewater ◽  
Current Densities

AbstractElectrochemical oxidation of pretreated distillery wastewater was performed using a boron doped diamond anode (BDD). The role of direct oxidation of organic matter was assessed with experiments of linear sweep voltammetry, noting that the deactivation of the electrode surface occurs in the region of potentials below oxygen evolution. Then, galvanostatic bulk electrolyses were conducted during 4 hours at current densities (20 mAcm

Remarkable increase in luminol electrochemiluminescence by sequential electroreduction and electrooxidation

2014 ◽  
Vol 50 (93) ◽  
pp. 14662-14665 ◽  
Author(s):  
Xiaoyun Liu ◽  
Wenjing Qi ◽  
Wenyue Gao ◽  
Zhongyuan Liu ◽  
Wei Zhang ◽  
...  
Keyword(s):  
Electrochemical Reduction ◽  
Electrochemical Oxidation ◽  
Linear Sweep Voltammetry ◽  
Sensitive Detection ◽  
Linear Sweep ◽  
Remarkable Increase

Luminol electrochemiluminescence is dramatically increased by about five hundred times by coupling electrochemical reduction and electrochemical oxidation using simple linear sweep voltammetry, enabling sensitive detection.

Simple Real-time Voltammetric Method for Captopril Determination in Pharmaceutical Formulation

2018 ◽  
Vol 69 (10) ◽  
pp. 2858-2862
Author(s):  
Mihaela Buleandra ◽  
Anton Alexandru Ciucu ◽  
Dragos Cristian Stefanescu
Keyword(s):  
Electrochemical Oxidation ◽  
Graphite Electrode ◽  
Linear Sweep Voltammetry ◽  
Kinetic Studies ◽  
Pencil Graphite Electrode ◽  
Peak Potential ◽  
Linear Sweep ◽  
Anodic Wave ◽  
Voltammetric Assay

A novel voltammetric assay for captopril (CAP) determination by using an electrochemically pretreated pencil graphite electrode (PGE*) is presented. The electrochemical oxidation reaction of CAP was investigated with PGE* by using cyclic voltammetry and linear sweep voltammetry techniques. CAP was electrochemically inactive at the non-pretreated pencil graphite electrode surface, while a sharp anodic wave with an anodic peak potential at around 200 mV resulted by using the PGE*. According to kinetic studies upon the electrode behavior, a new reaction mechanism for electrochemical oxidation of captopril is proposed. The sensor was examined as a selective, simple and precise new electrochemical disposable electrode for the determination of CAP in pharmaceutical samples in complex medical cases associated with sleep apnea, with good results.

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 

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.

scholarly journals Electrochemical Approaches for Rapid Characterization of Oxidizable Compounds in Different Oak Alternatives

Beverages ◽  
2020 ◽  
Vol 7 (1) ◽  
pp. 1
Author(s):  
Jéremie Wirth ◽  
Davide Slaghenaufi ◽  
Stéphane Vidal ◽  
Maurizio Ugliano
Keyword(s):  
Linear Sweep Voltammetry ◽  
Wine Industry ◽  
Wine Aroma ◽  
Total Current ◽  
Strong Correlations ◽  
Tannin Content ◽  
Linear Sweep ◽  
Antioxidant Characteristics ◽  
Rapid Characterization

Oak alternatives (OAs) such as chips, granulates or staves, are becoming increasingly used in the wine industry. Although they are mostly considered for their contribution to wine aroma, they are also a source of phenolic compounds to be released in the wine, in particular ellagitannins contributing to wine mouthfeel and antioxidant characteristics. In the present study, we explore the potential for a rapid analytical method based on linear sweep voltammetry (LSV) combined with disposable sensors to provide a rapid measure of the oxidizable compounds present in different OAs, as well as their characterization. Strong correlations were found between the tannin content of different OAs and the total current measures during LSV analysis, allowing a rapid quantification of the oxidizable compounds present, mostly ellagitannin. Application of derivatization to raw voltammograms allowed extraction of a number of features that can be used for classification purposes, in particular with respect to OAs types (chips or staves) and degree of toasting.

The cathodic reduction of PbO in the passive layer on lead in aqueous sulphuric acid

1984 ◽  
Vol 62 (3) ◽  
pp. 596-600 ◽  
Author(s):  
R. G. Barradas ◽  
D. S. Nadezhdin
Keyword(s):  
Experimental Data ◽  
Three Dimensional ◽  
Reference Electrode ◽  
Linear Sweep Voltammetry ◽  
Passive Layer ◽  
Cathodic Reduction ◽  
Linear Sweep ◽  
Current Time ◽  
Lead Monoxide ◽  
Two Peaks

The cathodic reduction of the lead monoxide layer formed on lead in 30% aqueous H2SO4 under anodic oxidation at 0.6 V (vs. Hg/HgSO4 reference electrode) was investigated by linear sweep voltammetry, potential step and admittance measurements. The experimental data were analyzed respectively in terms of thin-layer electrochemistry, electrocrystallisation, and changes of resistance of the PbO layer under reduction. The results seem to be best interpreted from the theory of three-dimensional electrocrystallisation as PbO is reduced to Pb. At sub-zero temperatures the PbO peak observed on our voltammograms and potentiostatic current time transients reveals the splitting of the curves into two peaks, which may be a result of reduction of the same material but of different phases, namely, orthorhombic and tetragonal PbO.

Sign in / Sign up

Export Citation Format

Share Document