graphite electrode cyclic voltammetry

Electrochemical Sensor for Hydroquinone based on

 · In this study eugenol and PVA were used to modify the graphite electrode by using the electropolymerization method. The proposed electrode exhibits a low limit of detection and good sensitivity stability and reproducibility towards the HQ determination by cyclic voltammetry. This

Pencil Graphite Electrodes A Versatile Tool in

In 1996 pencil leads were used as new electrodes in abrasive stripping voltammetry .Two years later a vibrating electrode based on a mechanical graphite pencil was reported to be used for the simultaneous potentiometric stripping determination of Cu(II) Cd(II) and Zn(II) traces in small samples .Perdicakis et al. proposed the use of pencil graphite electrodes for the immobilization

Electrochemical methods in investigation of methylene

 · various electrochemical techniques cyclic voltammetry differential pulse voltammetry and square wave voltammetry. A B ├─┤5 mm ├─┤10 µm Fig.1. (A) Screen printed three electrode system with round graphite working electrode 5mm in diameter graphite counter-electrode and silver reference electrode.

Electrochemical Detection of Dopamine and Tyrosine

 · Additionally NiO modified electrode also shows good sensitivity towards the detection of tyrosine so it acts as a good electrochemical sensor to assay tyrosine in the biological sample. Keywords MO modified graphite electrode Dopamine Tyrosine Ascorbic Acid Drop cast methodCyclic voltammetry Differential Pulse voltammetry.

Study on Electrochemical Oxidation of m-Nitrophenol on

 · electrode SnO 2 electrode and graphite electrode using cyclic voltammetry. The cyclic voltammetry measurements were performed in acidic (1 M H 2 SO 4 pH 0.4) neutral (1 M Na 2 SO 4 pH 6.8) and alkaline (1 M NaOH pH 12.0) media to investigate the effect of pH value on the oxidation of m-NP. The fouling of electrodes was also studied

Simultaneous analysis of Pb 2 and Cd 2 at graphene

 · A graphene/bismuth nanocomposite film-modified pencil graphite electrode was quickly prepared for the simultaneous analysis of cadmium and lead heavy metal ions by square wave anodic stripping voltammetry. The pencil graphite electrode s surface was directly modified from graphite to graphene with cyclic voltammetry method in a single step by performing potential cycling between −

Electrochemical methods in investigation of methylene

 · various electrochemical techniques cyclic voltammetry differential pulse voltammetry and square wave voltammetry. A B ├─┤5 mm ├─┤10 µm Fig.1. (A) Screen printed three electrode system with round graphite working electrode 5mm in diameter graphite counter-electrode and silver reference electrode.

One-step electrochemical preparation of graphene-coated

In this study a novel technique was investigated for the one-step production of graphene layers on a pencil graphite electrode. To the best of our knowledge this report is the first to describe the formation of graphene layers on a graphite electrode using cyclic voltammetry in 5.0 M nitric acid solution.The oxidation of the pencil graphite electrode occurred at the anode.

Cyclic voltammetric preparation of graphene-coated

 · In this work a one-step procedure for preparing graphene pencil graphite electrodes is developed by using cyclic voltammetry (CV). The potential is scanned from − 1.0 to 1.90 V (vs. Ag/AgCl) in a sulfuric acid solution in this system. The in situ electrochemical oxidation of graphite to graphene oxide (GO) and then the electrochemical reduction of GO to graphene are observed in the cyclic

Voltammetric analysis of naringenin at a disposable pencil

 · The electrochemical behaviour of the flavonoid naringenin (NGN) was investigated for the first time by cyclic voltammetry (CV) using a disposable electroactivated pencil graphite electrode (PGE ). In this electrochemical sensor NGN is irreversibly oxidized giving rise to two pH-dependent peaks due to mixe Electrochemistry for health applications

Voltammetric analysis of naringenin at a disposable pencil

 · The electrochemical behaviour of the flavonoid naringenin (NGN) was investigated for the first time by cyclic voltammetry (CV) using a disposable electroactivated pencil graphite electrode (PGE ). In this electrochemical sensor NGN is irreversibly oxidized giving rise to two pH-dependent peaks due to mixe Electrochemistry for health applications

Covalent attachment of TEMPO onto a graphite felt

This work describes a simple method to attach TEMPO by an amide link to a graphite felt electrode. The derivatization of the electrode is highlighted by cyclic voltammetry and XPS analyses. Cyclic voltammetry analyses showed the catalytic activity of the grafted TEMPO in

Covalent attachment of TEMPO onto a graphite felt

This work describes a simple method to attach TEMPO by an amide link to a graphite felt electrode. The derivatization of the electrode is highlighted by cyclic voltammetry and XPS analyses. Cyclic voltammetry analyses showed the catalytic activity of the grafted TEMPO in

Cyclic Voltammetric Studies on the Role of Electrode

 · further purification. Commercially available Camlin 0.7 mm graphite rods (0.07 cm diameter and 6 cm of length) are used as carbon electrode material to study the cyclic voltammetry. A highly conducting thin films of tin oxide doped with antimony (SnO 2 Sb 4 wt. ) on glass surface are also used as electrode materials. The

Cyclic voltammetry at the tubular graphite electrode

 · The theory of cyclic voltammetry at the tubular graphite electrode has been developed for reversible electrode processes. The convective diffusion differential equations have been transformed into an integral equation which is solved numerically.

Electrocatalytic hydrogen production on a modified pencil

 · Cyclic voltammetry was employed to investigate the catalytic performances of PAni-Chi and PAni-Chi/Au composite films coated onto the pencil graphite electrode for the hydrogen evolution reaction. A similar measurement for the PAni film was also performed for comparison .

One-step electrochemical preparation of graphene-coated

To the best of our knowledge this report is the first to describe the formation of graphene layers on a graphite electrode using cyclic voltammetry in 5.0 M nitric acid solution. The oxidation of the pencil graphite electrode occurred at the anode. Next the formed graphene oxide was reduced to graphene

Cyclic voltammetric preparation of graphene-coated

 · In this work a one-step procedure for preparing graphene pencil graphite electrodes is developed by using cyclic voltammetry (CV). The potential is scanned from − 1.0 to 1.90 V (vs. Ag/AgCl) in a sulfuric acid solution in this system. The in situ electrochemical oxidation of graphite to graphene oxide (GO) and then the electrochemical reduction of GO to graphene are observed in the cyclic

Electrochemical Sensor for Voltammetric Determination

 · square wave voltammetry catechol and ascorbic acid showed a well defined two separated oxidation peaks. The proposed method has been applied for the determination of catechol in the absence and presence of ascorbic acid in a water sample. Keywords Screen printed graphite electrode Catechol Cyclic voltammetry Square wave voltammetry 1.

Voltammetric pH sensor based on an edge plane pyrolytic

A simple sensor for pH determination is reported using unmodified edge plane pyrolytic graphite (EPPG) electrodes. The analysis is based on the electro-reduction of surface quinone groups on the EPPG which was characterised using cyclic voltammetry (CV) and optimised with square-wave voltammetry

Physical and Electrochemical Characterization of Modified

 · Graphite Nanoparticles-Phosphotungstic Acid-Nafion on Glassy Carbon Electrode for Bisphenol A Determination Azrilawani Ahmad 1 and cyclic voltammetry (CV). Several parameters such as GN concentration scan rate equilibrium time and pH of phosphate buffer were optimized in this study. The GN–PTA–Nafion modified GCE that

Electrochemical Deposition of Gold Nanoparticles on

AuNPs on Pencil Graphite by Fast Scan Cyclic Voltammetry J. Chin. Chem. Soc. Vol. 58 No. 5 2011 689 Fig. 1. Cyclic voltammogramof NaAuCl 4 (1.0 mM) at PG electrode at a scan rate of 1000 mV s-1 in N 2-saturated 0.5 M H 2SO 4. Inset shows larger view of the current peaks of the 1st and 2nd cy-cles.

Voltammetric determination of cysteine at a graphite

 · The electrochemical behaviour of cysteine (Cys) at a graphite electrode modified with gold nanoparticles (G-Aunano electrode) was studied by cyclic voltammetry. It was found that the graphite electrode-Au nanoparticles show an electrocatalytic activity towards the oxidation of Cys in 0.1 M NaOH. At 0.05 V there is an "inverse" maximum in the cathodic voltammogram of Cys.

Study on Electrochemical Oxidation of m-Nitrophenol on

 · electrode SnO 2 electrode and graphite electrode using cyclic voltammetry. The cyclic voltammetry measurements were performed in acidic (1 M H 2 SO 4 pH 0.4) neutral (1 M Na 2 SO 4 pH 6.8) and alkaline (1 M NaOH pH 12.0) media to investigate the effect of pH value on the oxidation of m-NP. The fouling of electrodes was also studied

Covalent attachment of TEMPO onto a graphite felt

This work describes a simple method to attach TEMPO by an amide link to a graphite felt electrode. The derivatization of the electrode is highlighted by cyclic voltammetry and XPS analyses. Cyclic voltammetry analyses showed the catalytic activity of the grafted TEMPO in

Electrochemical methods in investigation of methylene

 · various electrochemical techniques cyclic voltammetry differential pulse voltammetry and square wave voltammetry. A B ├─┤5 mm ├─┤10 µm Fig.1. (A) Screen printed three electrode system with round graphite working electrode 5mm in diameter graphite counter-electrode and silver reference electrode.

Preparation of a novel electrochemical sensor for

 · Molybdenum blue was electrodeposited on a pencil graphite electrode (PGE) by cyclic voltammetry and it was used in the detection of phosphate ions for the first time in the literature. Polyvinyl chloride was used as a coating agent for the modified electrodes to improve their stability. The characterization of the electrodes was done by using

Voltammetric determination of cysteine at a graphite

 · The electrochemical behaviour of cysteine (Cys) at a graphite electrode modified with gold nanoparticles (G-Aunano electrode) was studied by cyclic voltammetry. It was found that the graphite electrode-Au nanoparticles show an electrocatalytic activity towards the oxidation of Cys in 0.1 M NaOH. At 0.05 V there is an "inverse" maximum in the cathodic voltammogram of Cys.

Electrochemical behavior and voltammetric detection of

The modified pencil graphite electrode displayed excellent performance for the detection of fenitrothion. Cyclic voltammetry was used to study the dependence of the scan rate on the peak current and peak potential and to determine the kinetic parameters for fenitrothion.

Covalent attachment of TEMPO onto a graphite felt

This work describes a simple method to attach TEMPO by an amide link to a graphite felt electrode. The derivatization of the electrode is highlighted by cyclic voltammetry and XPS analyses. Cyclic voltammetry analyses showed the catalytic activity of the grafted TEMPO in

Cyclic Voltammetric Studies on the Role of Electrode

 · further purification. Commercially available Camlin 0.7 mm graphite rods (0.07 cm diameter and 6 cm of length) are used as carbon electrode material to study the cyclic voltammetry. A highly conducting thin films of tin oxide doped with antimony (SnO 2 Sb 4 wt. ) on glass surface are also used as electrode materials. The