Charif Dehchar- Doctor of Chemical Engineering
- University of Skikda
Charif Dehchar
- Doctor of Chemical Engineering
- University of Skikda
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36
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Introduction
Charif Dehchar currently works at University of Skikda. Charif does research in Catalysis, Electrochemistry and Materials science for fuel cells.
Skills and Expertise
Current institution
Publications
Publications (36)
In this paper, we investigated the characteristics of a structured copper (Cu) film deposited on the surface of an insulating epoxy glass (EG) substrate via a facile electroless plating process. The film produced by this method was found to be of high purity and has a homogeneous microstructure consisting of an assembly of numerous aggregates that...
In this work, we studied the electrodeposition of copper (Cu) microparticles on polypyrrole (PPy) films using cyclic voltammetry and chronoamperometry techniques. The initial stages of Cu deposition were investigated by performing current transients. Models based on Scharifker and Hills calculations were established to determine the nucleation and...
In this work, we describe a simple electrochemical procedure for synthesis of structured copper (II) oxide (CuO) films on copper (Cu) substrate for the reduction of hydrogen peroxide (H2O2). Films are grown in a single step by direct electrochemical oxidation of Cu foil from a solution of 5 M KOH using cyclic voltammetry method. Scanning electron m...
In this paper, we report a simple electrochemical strategy for the preparation of an electrode material based on polypyrrole (PPy) film grown on silicon substrate via oxidative polymerization technique and functionalized by palladium microparticles dispersed on its surface. SEM examination indicates the uniformity in loading of Pd on PPy surface fo...
This work reports the preparation of high-performance electrocatalytic electrodes based on structured copper deposits. The metal catalysts are synthesized by potentiostatic electrodeposition on a stainless steel substrate under hydrogen co-generation. This deposition technique generates evolving gases that lead to the formation of copper deposits i...
This work presents the preparation of a gold-polypyrrole (Au-PPy) composite film on a silicon (Si) semiconductor supported by electrodeposition, and the study of its electrocatalytic activity as an anode catalyst for the glucose oxidation reaction in alkaline media. The microstructure of the as-prepared Au-PPy film is characterized by scanning elec...
The work presented in this paper describes the preparation and the electrochemical application of functionalized chitosan-entrapped carbon paste electrodes (CH/CPE) for lead ions (Pb2+) detection in industrial wastewater. The chitosan was first functionalized using TiO2 and CuO, which were both metal oxides that were obtained by extracting it from...
In this work, we electrochemically developed a palladium–polypyrrole composite film on a silicon semiconductor support, and then studied its electrocatalytic activity — as an anode — towards the oxidation of glucose in an alkaline medium. The obtained electrode is characterized by various physicochemical techniques such as scanning electron microsc...
In this study, a non-enzymatic glucose sensor is proposed which offers a simple approach for glucose detection with a considerable sensitivity and cost-effectivity. In this regard, an electrodeposited Cu2O/ITO electrode as electrochemical sensor and its analytical performances evaluation for glucose detection in alkaline medium are performed. The a...
This work describes preparation of an electrochemical sensor based on composites of polybithiophene (PBTh) and palladium (Pd) microparticles, designed for the detection of glucose under alkaline conditions. The preparation method involved two-separated steps: First, the PBTh film was grown on an indium tin oxide substrate by oxidative polymerizatio...
This work describes preparation of an electrochemical sensor based on composites of polybithiophene (PBTh) and palladium (Pd) microparticles, designed for the detection of glucose under alkaline conditions. The preparation method involved two-separated steps: First, the PBTh film was grown on an indium tin oxide substrate by oxidative polymerizatio...
This work reports on the preparation of an electrode material based on polyaniline (PAni) thin film, with an average thickness of 100 nm, containing copper (Cu) microparticles dispersed on its surface. The prepared electrode material was employed as a sensor for glucose determination in alkaline medium. A two-step electrochemical process was used t...
The article “Enzyme-Free Glucose Sensor Based on Star-Like Copper Particles-Polyaniline Composite Film”, written by Ouafia Belgherbi, Dalila Chouder, Delloula Lakhdari, Charif Dehchar, Samiha Laidoudi, Leila Lamiri, Abderrazak Hamam and Lamria Seid, was originally published electronically on the publisher’s internet portal (currently SpringerLink)...
The purpose of this work is the development and characterization of a novel electrode material based on copper oxide (Cu2O) for use as electrode in solar cells application.
In recent years, the synthesis and characterization of structured materials based on
electronically conductive polymers (ECPs) have aroused considerable interest because of their possible use in different technologically relevant applications, such as modified electrodes for electrocatalysis, energy storage devices, corrosion and sensors.
In this...
The work described here deals with the development, characterization and study of catalytic properties of a modified electrode based on a structured copper film for the electrocatalytic oxidation of formaldehyde in alkaline solution. We first describe the preparation of the copper film using direct electroless deposition on the surface of epoxy gla...
This work aims to study the influence of palladium (Pd) microparticles size and dispersion on the electrocatalytic activity of polypyrrole (PPy) thin films for the electrooxidation of ascorbic acid (AA) in phosphate buffer solution (PBS, pH 7.0). The composites were prepared in an electrochemical way using electrodeposition technique under potentio...
In this study, we have interested to the electrochemical deposition on an indium tin oxide (ITO) substrate of composite films of polypyrrole functionalized by a dispersion of copper particles. The resulting copper-polypyrrole/ITO modified electrodes were used for the development of an amperometric sensor allowing the detection of ascorbic acid at l...
Ce livre décrit la préparation par voie électrochimique de films minces composites par inclusion de particules métalliques dans une matrice de polymère conducteur. Il propose une analyse des paramètres expérimentaux qui déterminent la dispersion et la taille des particules métalliques, et essaie de souligner la corrélation qui existe entre les prop...
In this work, a modified electrode of copper-polypyrrole (Cu-PPy) is elaborated by charging the polymer matrix by Cu particles. The response to ascorbic acid (AA) of this material was tested. The results show good performances. The results indicated a sensitive oxidation peak current of AA on the modified electrode. The success of this application...
Ce travail présente une étude bibliographique dressée à partir des travaux publiés dans la
littérature concernant la synthèse de nouveaux matériaux d'électrodes modifiées et leur usage en électroanalyse. Il rappelle quelques avantages majeurs générés par les électrodes modifiées, et présente quelques méthodes d'élaboration/fonctionnalisation, notam...
In this study, we investigated the characateristics of composite thin films of polypyrrole (PPy) and copper (Cu) particles deposited onto indium tin oxide (ITO) substrate. The composites were synthesized using a facile two-step electrochemical process: at first, PPy films were grown in organic media by electropolymerization method under potentiodyn...
In this paper, we report a simple sensing strategy for electrochemical determination of ascorbicacid (AA) using a combination of polypyrrole (PPy) thin film and palladium particles composites deposited onto n-doped silicon (Si) substrate. A two-step electrochemical process was employed to synthesize the composite films: At first, PPy film (average...
In this paper, we describe the preparation and characterization of a thin silver film deposited on a non-conducting epoxy glass (EG) substrate, previously sensitized with tin chloride (SnCl2) by electroless plating technique. The X-ray diffraction (XRD) analysis of the deposits showed pure crystalline structure with grain size of about 20 nm. The e...
In this work, we report a two-step electroless plating process for preparing a copper/silver composite film on a Resin Epoxy (RE) substrate. First, silver film was deposited on RE substrate from a silvering bath. Then, copper was deposited on silver film at 95 °C from a separate solution containing copper ions and formaldehyde as reducing agent. Th...
Electrodeposition is a method of depositing metals, semiconductors, alloys and thin oxide layers in liquid phases. Electrodeposition is highly requested for the development of different functional materials for its advantages over other methods. This method is not costly and easy technique to implement and pieces of large areas can be covered. Elec...
In this work, we investigated the improvement in electrical conductivity of polypyrrole (PPy) thin films incorporating palladium (Pd) particles. Firstly, the PPy thin films (100-400 nm in thickness) were electrogenerated onto n-doped silicon Si(111) substrate by electrodeposition method under galvanostatic control from an organic solution of the py...
Thin Silver films given the great well-developed in the materials science and characterization technologies are in high demand, given the wide-spread use of coatings in many engineering and science fields. In this paper, we report a simple image thresholding method to segment and to distinguish the pores from solid of thin Silver films prepared by...
The implications of the influence of alternating currents on buried pipelines are of great concern to all pipeline owners in world. The relevance of the interference is always increasing for operational personnel and for the protection of buried metallic structures from corrosion. The paper studies the electromagnetic interference problem between a...
This work is mainly devoted to the study of electrochemical performance anticorrosive of stainless steel 2205 duplex by immersion in different study at room temperature and different concentrations of corrosive species environments. The chemical composition and morphological structure of the stainless steel material, respectively, are characterized...
Le dépôt chimique d’un métal sur une matière non-conductrice de courant, à savoir les plastiques, peut être
réalisé en trois étapes : (i) sensibilisation par pré-catalyse de la superficie du substrat, (ii) activation chimique, puis (iii) métallisation par immersion dans un bain chimique convenable. Dans ce travail, un nouveau procédé, simple, sans...
Le présent travail récapitule le procédé purement chimique d’activation superficielle de la Bakélite et du verre époxy. L’opération a pour objectif de rendre conductrice la surface isolante par insertion chimique de l’Argent métallique, et consiste en de simples immersions consécutives des pièces dans différents bains chimiques. Après la mise à vif...
Questions
Questions (9)
In my knowledge, the most common redox couple used for ECSA determination is the ferri/ferrocyanide ([Fe(CN)6]3−/[Fe(CN)6]4−) couple in a potassium chloride (KCl) supporting electrolyte solution. This redox pair has well-defined oxidation and reduction peaks, which makes it suitable for accurately measuring the double-layer capacitance of the electrode. So, I want to know if any other electrolyte can be used for this purpose?
Hi,
Which tests allow the study of the electrochemical properties of an electrode material acting as anode or cathode catalyst for direct borohydride-hydrogen peroxide fuel cell?
