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.

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

Zn(II) porphyrin-based photocatalytic synthesis of Cu nanoparticles for electrochemical reduction of CO2

2018 ◽  
Vol 22 (05) ◽  
pp. 406-412 ◽  
Author(s):  
Siyu Zhang ◽  
Xue Zhang ◽  
Huiyuan Liu ◽  
Yang Lv ◽  
Zhongjun Hou ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Gas Chromatography ◽  
Electrochemical Reduction ◽  
Copper Nanoparticles ◽  
Linear Sweep Voltammetry ◽  
Cu Nanoparticles ◽  
Linear Sweep ◽  
Acid Sodium Salt ◽  
Reduction Of Co2 ◽  
Photocatalytic Synthesis

Copper nanoparticles frequently exhibit unique electrocatalytic activity for the electrochemical reduction of carbon dioxide. However, the synthesis of Cu nanoparticles in aqueous systems remains rare. Herein, we report the synthesis of copper nanoparticles by using a zinc(II) porphyrin-based photocatalytic method in the presence of polyacrylic acid sodium salt (PAA) in water under visible light irradiation, leading to a series of Cu nanoparticles with relatively small average sizes ranging from 69 to 97 nm. PAA molecules adsorbed on Cu nanoparticles were simply removed by washing with copious amount of water. The purified Cu nanoparticles show some activity toward the electrochemical reduction of carbon dioxide as evidenced by linear sweep voltammetry (LSV) and gas chromatography (GC).

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 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

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 

Stoichiometry and mechanism of the cathodic reduction process for HCl dissolved in LiCI-KCl eutectic

1975 ◽  
Vol 28 (12) ◽  
pp. 2579 ◽  
Author(s):  
NQ Minh ◽  
BJ Welch
Keyword(s):  
Charge Transfer ◽  
Hydrogen Atom ◽  
Electrochemical Reduction ◽  
Glassy Carbon ◽  
Reduction Process ◽  
Linear Sweep Voltammetry ◽  
Chloride Ions ◽  
Carbon Electrode ◽  
Linear Sweep ◽  
Step Mechanism

The electrochemical reduction of HCl dissolved in LiCl-KCl eutectic has been studied by linear sweep voltammetry and chronopotentiometry at a glassy carbon electrode. The dissolved HCl is found to be completely dissociated into protons and chloride ions, and the cathodic evolution of hydrogen proceeds by the two-step mechanism ���������������������������� H+ + e ↔ H ���������������������������� H + H ↔ H2 The charge-transfer step is reversible and faster than the hydrogen atom combination reaction.

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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